AMERICAN MUSEUM NOVITATESNumber 1058

Published byTHE AMERICAN MUSEUM OF NATURAL HISTORY

New York CityApril 15, 1940

A KEY TO THE KNOWN ANTHIDIINE BEES OF OREGON, WITHDESCRIPTION OF SOME NEW FORMS

BY HERBERT F. SCHWARZ

Several years ago I published a littlepaper (1930, Jour. N. Y. Ent. Soc.,XXXVIII, pp. 10-14) based on anthidiinebees collected in Oregon and kindly sub-mitted to me by Professor H. A. Scullenof the Oregon State Agricultural College.Since the appearance of this paper I havehad opportunity from time to time to ex-amine additional Oregonian specimenswhich Professor Scullen has been goodenough to send me for identification. Re-cently a further shipment of OregonianAnthidiinae has been received from Dr.George R. Ferguson of the Department ofEntomology at Corvallis. These severalshipments of bees have contained compara-tively few new forms but they have been ofdistinct interest in showing the range anddistribution within the state of the knownforms. It seems in order to issue at thistime a key to the Oregonian species andvarieties of Anthidiinae, for after suchassiduous collecting on the part of thoseconnected with Oregon State AgriculturalCollege the list is probably approachingcompletion. Nevertheless this statementmay be premature, for the last shipmentcontained not only a species and two varie-ties believed to be new but also a specimenof Callanthidium illustre of which I had nothitherto seen examples from the state.The specimen of illustre, a male, was col-lected at Medford, at an elevation of 1375feet on June 20, 1937 (Bolinger-Jewett).

KEY TO OREGONIAN ANTHIDIINESMALES

1.-The tarsal claws without a clearly de-veloped pulvillus........... 2.

A well-defined pulvillus present betweentarsal claws........... 14.

2.-The outer recurrent nervure going beyondthe end of the second cubital cell. Largebees, 13 to 15 mm. in length, richlymaculated. (Callanthidium).. 3.

The second recurrent nervure not goingbeyond the end of the second cubitalcell, completely interstitial with secondtransverse cubital nervure. (Anthi-dium) .... .......... 4.

3.-The middle of the pygidium with an acutespine that extends nearly as far apicallyas the slightly produced tips of the broadlateral lobes. The clypeus yellow.......................formosum(Cresson).

The middle of the pygidium with a bluintshort spine or tubercle that is far basadof the tips of the somewhat triangularlateral processes. The clypeus yellowwith a large black median area...............................illustre(Cresson).

4.-The front dull with a dense, microscopic,granular surface, which is dotted oversomewhat sparsely and irregularly withclearly defined and on the whole fairlywell-separated punctures. Tergites 1-5of the abdomen each with four spotsthat are rather triangular in shape.The spines on the sides of segment 6rather strongly incurved and somewhathooklike in appearance. The lateralprocesse3 of the pygidium very long andspiniform..... maculosum Cresson.

The front rather uniform in appearance,closely and somewhat indistinctly punc-tured..... 5.

5.-The last visible sternite with a sharptriangular emargination at the middle ofits apex in addition to having a spine ateach of its lateral extremities. Thepygidium crescentic in outline if thecentral spine be disregarded. The tibiaewithout maculations (except sometimesat the apex of the fore tibiae) .............. . . . . . palliventre Cresson.

The middle element of the last visiblesternite entire at the apex............ 6.

6.-The lateral processes of the pygidiumnarrow and usually elongate, the distanceseparating them from the central spinebeing usually two or more times theirwidth, fingerlike or semi-spinelike incharacter................... 7.

The lateral processes broad: rounded ortruncate at their apical end or ratherwidely angulate, not narrowly produced....................................8.

7.-The clypeus with a distinct impress or adimple at the middle of the apex.

AMERICAN MUSEUM NOVITATES

The tibiae extensively maculated. Thepygidium red and the under side of theabdomen as well as the tergites (exceptfor their usually heavy yellow macula-tions) more or less suffused with red....................... edwardsii Cresson.'

The clypeus not dimpled, perfectly archedalong the apex, only the contour of whichis very slightly emarginate to sub-truncate. The front and middle tibiaemaculated at the apex but not at thebase. The pygidium, like the groundcolor of the rest of the abdomen, black..................banningenseCockerell.

8.-The lateral processes of the pygidium short,broad, and usually truncate at the apex,two or more times the width of the spaceseparating them from the central spine,which terminates about on a level withthem. Maculations cream-colored, us-ually lacking on tubercles, mesonotum,and scutellum ....... ..... divi-sum Cockerell (= brachyurum Cockerell).

The lateral processes of the pygidium rela-tively long, extending beyond the apexof the central spine, and more or lessrounded or angulate at the tip........ 9.

9.-The apex of the tibiae with a large yel-low maculation that is much more con-spicuous than the reduced maculationat the base of the tibiae. Tergite 1 witha yellow spot at each of its lateralextremities separated by a wide area ofblack, rarely with two more or lessspecklike, median spots as well. Theapical margins of the abdominal ter-gites densely punctured................................. nebrascense Swenk. 2

The tibiae wholly maculated or with basalmaculations that at least on the middleand hind pair are more conspicuousthan the apical maculations if such bepresent.... 10.

10.-The tibiae externally completely or almostcompletely maculated .............. 11.

The tibiae with a basal spot or with abasal stripe that does not extend to theapex. The maculations of thorax, legs,and abdomen cream-colored......... 12.

11.-The middle of the apex of the elypeuswith a dimplelike depression, not merelyan emargination. The maculations verypale yellow ... permaculatum Cockerell.

The apex of the clypeus with merely acurvilinear emargination at its middle.The maculations tending to lemon-yellow. . mormonum Cresson.

1 A. tricuspidum Provancher is a not very clearlyseparable variety and A. depressum Schwarz an ex-treme case of undermaculation of edwardsii.

2 Although I have not seen the type of nebrascense,what I have interpreted as nebrascense is structurallylike mormonum and perhaps should be regardedmerely as the undermaculated extreme of this rathervariable species. See Schwarz, 1928, CanadianEntomologist, LX, pp. 213-214; also comments inthe present paper.

12.-Tergite 1 immaculate..................tenuiflorae variety yukonense Cockerell.

Tergite 1 with usually four maculations. 13.13.-The venter with silvery gray hairs. The

tubercles immaculate. The lateral mem-bers of the last visible sternite prolongedfingerlike or spinelike, ending about ona level with the middle member...........................tenuifloraeCockerell.

The venter in almost all cases with at leastsome black hairs, these sometimes pre-dominant. The tubercles almost in-variably maculated. The lateral mem-bers of the last visible sternite some-what more triangular in shape, a littleless attenuated apically, and ending ona level distinctly below the middlemember............ atriventre Cresson.3

14.-The scutellum broadly truncate posteriorly.The tubercles somewhat carinate above,not with a scalelike extension anteriorly.The lateral face marks terminated at thelevel of the insertion of the antennae.Segment 6 with a distinct, if low, glis-tening carina and an inverted T-shapedfigure in black, one arm of which occu-pies the space between the strong tuber-culate prominences. The pygidiumfaintly bilobed, or shallowly emarginateat the apex, with a subtuberculate promi-nence at the point of junction of the twolobes......................................Anthidiellumrobertsoni (Cockerell).

The scutellum more or less rounded behindor even faintly emarginate. The tu-bercles extended scalelike anteriorly(Dianthidium) .................. 15.

15.-Legs ferruginous to the exclusion or virtualexclusion of yellow or cream-coloredmaculations. The maculations of thethorax more or less suffused with ferru-ginous. Abdominal tergites with dis-tinctly yellow maculations superimposedusually on a reddish and black (rarelywholly reddish or wholly black) ground,the black largely confined to the basalarea, the red to the apical region of eachtergite. The pygidium apically trun-cate, with a small median tooth, verybriefly separated by a shallow notch fromthe truncation to each side of it and ex-tending very slightly beyond that trunca-tion ...................sayi Cockerell.

The maculations of the legs and thorax,at least, without red . 16.

16.-The pygidium continuously truncate alongits apical contour except for rounding ateach of its lateral extremities and a smallmedian tooth that appears merely as aprojection on the otherwise uninter-ruptedly truncate edge. The macula-tions variable but as a rule rather rich........................ulkei(Cresson).

3 Probably what I described in 1930 (Journ. N. Y.Ent. Soc., XXXVIII, pp. 10-13) as sculleni should bemerged with atriventre.

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ANTHIDIINE BEES OF OREGON

The pygidium either not truncate apicallyor with the median tooth clearly sepa-rated from the lateral lobes.......... 17.

17.-The apical contour of the pygidium in-sloping from each side upon the base ofthe median tooth, and as a result verybroadly V-shaped if the median toothbe disregarded..................... 18,

The median tooth of the pygidium clearlyseparated by a hemispherical emargina-tion from the apically rather truncatelateral lobes....................... 19.

18.-Maculations rather full: the scutellum witha stripe along its posterior margin; thestripes on the tibiae very broad andlong, covering the entire exterior faceof the joint to the virtual exclusion ofblack; the two halves of the bands ontergites 2-5 invaded by black pos-teriorly but not completely penetrated................ heterulkei, new species.

Maculations more restricted: scutellumimmaculate; -the stripes on the fore andmiddle tibiae linelike and interrupted,the hind tibiae with merely a basal spot;abdominal bands disintegrated into fourspots on tergites 2 and 5 ........ heterul-kei variety cornucopiana, new variety.

19.-The median tooth of the pygidium sepa-rated from each lateral lobe ratherbroadly (by nearly the width of thelateral lobe at its apex), somewhatdown-slanting (best seen when the insectis viewed from the side) and long, ex-tending well beyond the lateral lobes. 20.

The median tooth separated from eachlateral lobe by much less than the widthof the lateral lobe, not down-slanting,virtually on the same level as the laterallobes and coextensive with them ..... 21.

20.-The apical rims of the tergites black. Theapical sternite emarginate at its apicalmiddle. . pudicum (Cresson).

The apical rims of the tergites reddish orreddish brown. The apical sternitescarcely or not at all emarginate............................. dubium Schwarz.

21.-Scutellum posteriorly maculated............................. parvum (Cresson).

Scutellum immaculate.................... parvum variety subparvum (Swenk).

FEMALES1.-The tarsal claws without a clearly defined

pulvillus. The mandible with a num-ber of closely placed teeth of somewhatirregular size....... ........ 2.

A well-defined pulvillus present betweenthe tarsal claws....-. 16.

2.-The outer recurrent nervure going beyondthe terminus of the second cubital cell.Large bees (11 to 15 mm. in length),richly maculated. The lateral facemarks extending about to the level of theanterior ocellus. The last tergite with atooth at each side midway down the seg-

ment and with two much larger lobelikestructures at the tip, formed by a semi-circular emargination of the apex. (Cal-lanthidium) ........................ 3.

The second recurrent nervure not goingbeyond the second cubital cell butinterstitial with second transverse cubi-tal nervure. The lateral face marks oftenlacking; when present, terminating at alevel not above that of the- base of theantennae. (Anthidium) ............ 5.

3.-The mandible with 7 teeth. -The sixthtergite with usually a Nblak spot im-bedded to each side in the yellow areabut without a ribbon of black bisectingthe segment medianly. The two lobesat the apex broadly rounded................................illustre (Cresson).

The mandible with 6 teeth. The lasttergite without black spots imbeddedin the yellow but with a median blackband bisecting the tergite longitudinally.The two apical lobes somewhat lessrounded, more acute................ 4.

4.-The mesonotum without L-shaped macula-tions bordering its arterior margin andsides.. formosum (Cresson).I

The mesonotum with L-shaped maculationsformosum variety consonum (Cresson).2

5.-The front dull with a dense, ultramicro-scopic, granular surface, over which arescattered irregularly and rather sparselycertain clearly defined and non-cancellatepunctures. The sides of the face immac-ulate but the lower half of the elypeuswith two large spots. Tergites 1-5 ofthe abdomen each with four maculationsof triangular or subtriangular shape.Tergite 6 immaculate, with stronglydeveloped lateral teeth; the contourbeyond the teeth sinuate; a depressiontoward the apex on each side of themedian longitudinal carina................ . . . . . maculosum Cresson.

The front rather uniform in appearance,with densely crowded punctures. Theabdomen sometimes four-spotted onsome but not on all of the first five

1 What is here designated formosum is the insectwhich Ct8sson described in 1879 as conspicuum onthe. basis, of the female. There is, it would seem, acurious absence in the literature regarding either thefemale of formosum or the male of conspiciuum.Cockerell (1909, Entomol. News, XX, p.-262) alludesto the male of conspicuum but the characters thathe gives in his key to conspicuum and its close rela-tives fit the male of formosum perfectly atid formosumis not mentioned in the key. In my -estimation for-mosum and conspicuum are the same insect; thename formosum has priority.

2 In view of the interpretation in the previous foot-note, what Cresson designated as ilustre varietyconsonum (1879, Trans. Amer. Entomol. Soc.,- VII,p. 207) and what subsequently I designated con-spicuum variety consonum (1928, Journ. N. Y. En-tomol. Soc., XXXVI, p. 391) should now be calledformosum variety consonum. The form consonumis merely one extreme of maculation, more or less con-nected through intergrades with the less maculated,typical formosum.

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4 AMERICAN MUS

tergites, which for the most part havemerely medianly divided bands...... 6.

6.-The clypeus and sides of face black.... 7.The clypeus and the sides of the facemaculated....................... 12.

7.-The legs wholly black, without macula-tions even on the tibiae.............. 8.

The legs with maculations on the tibiae.9..9.

8.-The tubercles, the axillae, and the pos-terior rim of the scutellum maculated.The last tergite with two unusually well-developed sharp teeth.................

... banningense Cockerell.The tubercles, axillae, and scutellum black.

Hairs of mesonotum usually stronglyorange-colored...... palliventre Cresson.

9.--The ventral scopa almost invariably blackor prevailingly dark. The face belowthe antennae often with considerableblack hair. The maculations at thebase of the tibiae often extended welldown the joint. Either the axillae andposterior margin of scutellum or merelythe scutellum usually maculated........................... atriventre Cresson.

The ventral scopa silvery gray or silverygray laterally deepening to yellowish inthe middle. The face below the an-tennae with only pale hairs. The axillaeand scutellum black............... 10.

10.-The tibiae with large maculations at theapex but without maculations at thebase of at least the front and middle pair.The punctation on the apical rims of theabdominal tergites very dense, withoutshiny interspaces. The apical tergiterather notably emarginate on each sidebetween the blunt lateral tooth and thetruncate apex of the segment. Abdomi-nal maculations yellowish...........wallisi variety wallowana, new variety.

The tibiae with a small pale spot only atthe base, no maculation at the apex.The punctation on the apical rims ofthe abdominal tergites less crowded,with shiny interspaces between the punc-tures. The sides of the apical tergitebeyond the teeth, which are less promi-nent, only very briefly emarginate.The abdominal bands usually paler,inclining to cream-color .............. 11.

11.-Tergite 1 of the abdomen either four-spotted or with a medianly interruptedband the two halves of which are eitheremarginate or with an imbedded blackspot.tenuiflorae Cockerell.

The maculations on tergite 1 reduced to aspot at each lateral extremity..........tenuiflorae variety yukonense Cockerell.

12.-Tergite 6 virtually without angulation,presenting a smooth, uninterruptedcontour. The apical part of the tergites(that part posterior to the maculations)densely and minutely punctate, dull inappearance. The clypeus yellow except

UM NOVITATES [No. 1058

for a rather broad stripe of black downthe middle ...... edwardsii Cresson.

The lateral angles of tergite 6 thrown intoprominence by a more or less sharpbend in the contour, with resulting smalltoothlike or subtoothlike projections. 13.

13.-The maculations on tergite 1 of the ab-domen confined to a spot at each lateralextremity...... nebrascense Swenk.

The maculation of tergite 1 more extensive.................................. 14.

14.-The clypeus bimaculate, with the spotsconfined to its lower half; in rare casesa third spot between the lateral spots.The side-facial maculations not com-pletely filling the space between theclypeus and the inner orbit of the eye.The tibiae not wholly maculated ex-ternally but with merely a more or lessstripelike maculation............ divi-sum Cockerell (= brachyurum Cockerell).

Not presenting this combination of charac-ters................ 15.

15.-The maculations pale yellow. The macu-lations of the clypeus confined to a spoton each side, which usually, however,extends from base to apex................permaculatum Cockerell.

The maculations lemon yellow. The clyp-eus typically wholly maculated but some-times more or less invaded by black, es-pecially basally.... mormonum Cresson.

16.-The posterior margin of the scutellumbroadly truncate. The tubercles carin-ate above, but without a scalelike expan-sion anteriorly. The clypeus black;the sides of the face maculated to thelevel of the base of the antennae.............Anthidiellumrobertsoni (Cockerell).

The scutellum more or less rounded pos-teriorly or even faintly emarginate.The tubercles with a scalelike prolonga-tion anteriorly. (Dianthidium) ...... 17.

17.-The legs largely or wholly ferruginous.Tergites 1-2 of the abdomen, and oftenalso tergite 3 with usually much redapically and sometimes basally............ sayi Cockerell.

The legs largely black and yellow to creamcolored, or mainly black, or mainly yel-low......... 18.

18.-The apices of the abdominal tergites, par-ticularly those of the basal tergites,strongly invaded by rust red. The basalhalf of the mesopleura with a largemaculation. The apical one-third of themandibles rust red .... dubium Schwarz.

The apices of the abdominal tergites black...................................19.

19.-The maculations cream-colored. Thetibiae usually with merely a spot at thebase.pudicum (Cresson).

The maculations of deeper hue, lemonyellow....................... 20.

20.-Rather fully maculated, with as a rule someor all of the following marks: large spots

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ANTHIDIINE BEES OF OREGON

on the clypeus, supraclypeus, mark onfront, tibiae more or less completelymaculated, stripes on femora, medianlydivided bands on tergites 2-5, sparinglyor even not at all emarginate posteriotly...................... ulkei (Cresson).'

The spots on clypeus usually small, some-times absent. Usually only basalspots or short stripes on tibiae....... 21.

21.-The scutellum maculated posteriorly'....................... parvum (Cresson).

The scutellum immaculate.................. parvum variety subparvum (Swenk).

Anthidium wallisi variety Wallowan^,new variety

Also a discussion of Anthidium nebras-cense Swenk

9 .-HEAD black, with the only maculation aroundish yellow spot above the summnit f, theeye. The eye greenish gray mottled wiiAhblack toward its inner half. The head denselyand somewhat cancellately punctate. Th-emandibles sexdentate. The clypeus emarginatealong the middle, flanked by two rather well,developed teeth on each side, the:j~iVr teethslightly the larger. The hair long, silvery gray,somewhat more yellowish on the vertex.THORAX with mesonotum and mesopleura

punctured much like the head. Tegulae morelightly and sparsely punctured, particularlytoward the summit, which is rathr hhiy.

Thorax black, wholly without maculations, withlongish silvery gray hairs at the sides, moreyellowish hairs on the mesonotum and scutel-lum. The propodeum dull with a dense, fine,granular tessellation, on which are traceable,particularly near the base, faint blotchy shallowpunctures where the hairs emerge.LEGS mostly black; small tarsal joints (ex-

cept for the darkened teeth on the claws) brightreddish. No yellow maculations except on thetibiae, all of which have a subapical stripe ohtheir outer face but lack a basal spot except in

the case of the hind pair. Hairs silvery grayexcept for the pale golden brushes on the innerface of the metatarsi and the red spines on thesmaller tarsal joints.WINGS very slightly fuliginous, particularly

in the upper half of the marginal cell anid towardthe apex. The stigma and venation fuscous.The number of hamuli in the lower wing 21.ABDOMEN black, with lemon-yellow macula-

tions on all the tergites. On tergite 1 there aretwo large lateral spots and two diminutivelinear inner spots. The maculations on ter-gites 2-5 consist of a medianly divided band,the halves of the band progressively more ap-proximate from tergite to tergite, very narrowlyseparated on tergite 5. Above, the halves ofthe band are deeply but rather narrowly emar-

ginate in the case of tergites 2 and 3; with only a

I See also description of putative female of Dian-thidium heterulkei, new species.

specklike emargination above on tergite 4;only sinuous above on tergite 5, the'halves ofthe band on this tergite being of rather uniformwidth throughout, instead of the ininer elementbeing smaller than the outer a is th case on thehalves of the bands on the other tergites.' Ter-gite 6 bimaculate, each macu4lation rounded andthick on the inner side, more narrowed towardthe outer side, with a notchlike emarginationabove at the middle. The scutptu$rpg puctate-tessellate on the basal parts iof the -tergites,the punctation denser and less indistin'ct onthe black areas than on the yellow band~; es-pecially dense and without shiny in'terspaceson the apical rims of tergites -5. Tergite 6with a rather decisive emarginiaion between thelarge, blunt lateral tooth (about midw:ay downthe side) and the truncate apical end Qf the seg-ment. The ventral scopa' siivery gray, thedorsal hairs ochraceous.Length 8 mm.; width 2 3/4 mm.; length of

forewing, including tegula, 7 ri,nR;l

Fig. 1. The last two abdomninal tergites of An-thidium wallisi variety wallowaria new variety,2 (holotype).

OREGON.-Lick Cr. RS,WTallowC Na-tional Forest, 4600 feet? Aug. 16, 1937(Bolinger-Jewett).

I have not seen the type of wallisi, butsuch characters in CockerelV's d$$uription(1913, Can. Ent., XLV,p.C3) of that insectas "lateral toothlike angles of sixth ab-dominal segment very promninent; broaddepressed apical marginsi of abdominalsegments excessively, minutejy and denselypunctured, not shining (shining and lessdensely punctured in temuiflorae)" makeit seem likely that thej two insects arestructurally alike. Moreover, Cockerell'sdescription applies in the main, too, asregards maculation. The present insectdiffers in having the face entirely immacu-late, the hind basitarsi immaculate, ter-gite 2 bimaculate instead of quadri-maculate, and the wings not "stronglybrownish." However, the characteristicmaculation of the tibiae, with the stripes

1940 ] 5

AMERICAN MUSEUM NOVITATES

on the lower part of the joint instead ofthe upper, the lack of maculation on thethorax, and in the main the abdominalmaculations indicate similarity in the ap-pearance of the two insects.

If I am right in interpreting wallisi asstructurally like the insect before me, then Iam inclined to reiterate a suggestion madeyears ago (1928, Can. Ent., LX, pp. 213-214) that nebrascense Swenk is merely amore fully maculated example of wallisi,which has priority by a year. Morefundamentally wallisi (if correctly inter-preted), nebrascense, and the present insectare all structurally so like mormonumthat they can be definitely assigned to themormonum complex. Anthidium nebras-cense was described from Nebraska (1914,Univ. Studies Univ. Nebraska, XIV, pp.14-15). The following year Swenk recog-nized it from California and Cockerell(1924, Proc. Calif. Acad. Sci., (4) XIV, pp.345-346) reported it also from California.I have seen what I have interpreted asnebrascense not only from California andOregon but also from British Columbia(1928, Can. Ent., LX, pp. 213-214).The dense punctation on the apical rimsof the abdominal tergites that characterizeswallisi and wallowana is characteristic alsoof the males that I have interpreted asnebrascense just as it is characteristic ofboth sexes of mormonum. The pygidiumof wallowana is strikingly like that of thefemale of mormonum just as the armatureof the last visible sternite of what I haveinterpreted as the male of nebrascenseagrees with the corresponding structure ofthe male of mormonum.There is doubt in my mind whether

Swenk's allotype of nebrascense is correctlyassociated with the male holotype. Theallotype is from Wyoming and its pygidiumis "rounded, with short lateral spines,"whereas in mormonum and wallowana, atleast, the apex of the female is truncate.

Dianthidium heterulkei, new speciese.-Black, with lemon-yellow maculations.HEAD with maculation over entire clypeus

except for narrow apical border of blackishbrown, stripe along the inner orbit of the eye(broad below, filling the space between eye andclypeus, thence tapering off to terminate about

on a level with the anterior ocellus), a con-tinuation of this stripe briefly just below thesummit of the eye along the upper third of theouter orbit of the eye, sometimes a small supra-clypeal triangle (holotype), outer face of man-dible except for the black apex, which has atooth on the outer half and the inner half con-cealed by a dense patch of light brownish hair.THORAX with lemon-yellow maculations in

following regions: a spot on each side of theanterior border of the mesonotum that is aboutas long as the distance separating it from theantero-lateral angle of the mesonotum, tubercleson their outer half, anterior half of tegulae withouter border byaline, narrow stripe posteriorlybordering scutellum, sometimes interrupted atthe middle (holotype) and sometimes extendedon to the axillae.LEGS with lemon-yellow maculations in the

following areas: middle and hind femorabriefly above at the apex, stripes below on theapical half of the front and middle femora(holotype) or sometimes lacking on the middlefemora, very broad stripes from base to apex(holotype) or nearly the apex (paratype) on theouter face of the front, middle, and hind tibiae,those on the hind tibiae invaded by a largeblack spot anteriorly about half way down thejoint, all of the metatarsi externally, and therather long and robust spine on the hind coxae.The spurs on the hind tibiae reddish hyaline toyellowish.WINGS slightly smoky, more especially so in

the upper half of marginal cell and toward apex.Stigma reddish brown; venation fuscous toblack. The second recurrent nervure extendsbeyond the second transverse cubital nervureabout as far as the first recurrent extends be-yond the first transverse cubital. Number ofhamuli per hind wing from 12 to 14.

Fig. 2. The pygidium of Diarthidium heterul-kei, new species, e (holotype).

ABDOMEN with tergite 1 three-spotted, thecentral maculation more linear than the lateralones, tergites 2-5 with two somewhat hemi-spherical maculations that are posteriorly emar-ginate and narrowly separated at their down-curved inner extremities, on tergite 2 so nar-rowly that they tend to unite (holotype). Ter-gite 6 entirely black or with a small maculationnear the apex at the middle (holotype). Seg-ment 7 maculated except for a narrow area ofblack at the base and a narrow hyaline borderapically. Tergite 6 has a clearly defined longi-tudinal carina. Tergite 7 also with a strongmedian longitudinal carina that terminates in ashort but prominent tubercle-like tooth. Theapical contour of the pygidium slants inwardfrom each side to join the base of this tooth.

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ANTHIDIINE BEES OF OREGON

Punctation dense on head and thorax,sparser and in the black areas, at least, more dis-tinct on abdomen.

Hair of head, thorax, legs, and abdomensilvery gray except for the under side of themetatarsi, which have the hairs yellowish.

Length 7 mm.; width 2 1/2 mm.; length offorewing, including tegula, about 7 mm.

9 -Black, with lemon-yellow maculations.HEAD with a maculation at each side of

clypeus that extends from base to apex; lateralface marks broad below, filling the space be-tween elypeus and inner orbit of eye, extendingattenuated to level of anterior ocellus, and con-tinued (after an interruption at the summit ofthe eye) somewhat broadened along the upperthird of the outer orbit of the eye. A faint spotbelow anterior ocellus. Clypeus slightly emar-ginate at the middle. Mandible with two teethon outer half of apex, followed by a slight emar-gination that terminates at the inner angle of theapex.THORAX as described for male except that

apical band rims uninterruptedly both the axillaeand scutellum.LEGS with the knees of the middle and hind

femora briefly maculated as in the male but witha stripe beneath only toward the apex of thefront femora (as in one of the male paratypes).The stripes on the outer face of the front andmiddle tibiae, like those of the male, ratherbroad and extending from the base almost tothe apex. The hind tibiae with a large basalspot that extends narrowed about half waydown the posterior margin of the joint, which isotherwise black. Spines on hind tibiae reddish.Metatarsi immaculate.WINGs as described for male. Number of

hamuli per hind wing 14.ABDOMEN maculated much like that of male,

trimaculate on tergite 1 and bimaculate ontergites 2-5, these maculations being, as in themale, hemispherical but less emarginate withblack posteriorly and rather more widely sepa-rated (especially on tergites 3-4), not in theleast in danger of coalescing. A median longi-tudinal carina faintly traceable (not nearly sodistinct as in the male) on the densely puncturedblack tergite 6, which has only two specklikemaculations that are easily overlooked.

Punctation and coloration of hairs as de-scribed for male. Ventral scopa silvery gray.

Dimensions same as for male.OREGON.-Elk Lake, Deschutes Na-

tional Forest, elevation 4600 feet, Aug. 21,1937 (Bolinger-Jewett), holotype, allo-type, and 1 paratype; Diamond Lake,Douglas County, elevation 5182 feet, Aug.27, 1937 (Bolinger-Jewett).The male of this species differs struc-

turally from the male of parvum and ofpudicum in that the broad area to each sideof the central tooth of the pygidium is not

decisively separated from that tooth bywhat in parvum and pudicum amountsusually to a rather semicircular emargina-tion; instead, the sides of the pygidiumslant inward gradually to unite with thebase of 'the tooth. From the pygidiumof the male of ulkei the pygidium of heter-ulkei differs also through the inslantingcharacter of its sides, these being emphati-cally truncate in ulkei. It differs alsoin the greater prominence of its middletooth, the tooth of ulkei appearing likean excresence on the truncation. Inpudicum the central tooth extends farbeyond the lateral lobes of the pygidium, inulkei slightly beyond the truncation, inparvum and subparvum it ends at the samelevel as the lateral lobes. In contrast tothese conditions the central tooth of thepygidium of heterulkei actually does notquite reach the level of the outer extremi-ties of the sides of the pygidium. Thepygidial structure of heterulkei resembles,indeed, very closely that of Dianthidiumcressoni Dalla Torre (= venustum Cresson)and in the maculation of these two bees,as well, there is considerable parallelism.But heterulkei is at once separable by itsnotably smaller size, 7 mm. as against 11mm. in the case of cressoni, and its macu-lations lack the fullness attained by thoseof cressoni.The allotype of heterulkei comes from

the same locality as the holotype and oneof the paratypes and has data on the labelthat are identical with the data pertainingto them. In its maculations it also soclosely approximates those of the malethat there can be little doubt that the twosexes are correctly associated. In ap-pearance the female closely approximatesthat sex of ulkei and it is difficult in the keyto give characters that have final validitydue to the variability in the maculationsof ulkei and the further fact that only asingle specimen of the putative female ofheterulkei is available for comparison. Ifthis female is representative of the species,then this sex of heterulkei is apt to be lessmaculated than the corresponding sexof ulkei, more nearly approaching ulkeivariety riparii Schwarz (1928, Journ. N. Y.Ent. Soc., XXXVI, pp. 399-400) in its

1940 ] 7

AMERICAN MUSEUM NOVITATES

maculations than typical ulkei. Like ulkeivariety; riparii- and like certain Oregonianrepreqitti.V46f ulkei-those from ThreeRivers and Antelope Mt., which are

available for comparison-the female ofheterulkei has posterior emarginations on

all the abdominal maculations from ter-gites - It differs from these otherOregonian specimen$ iX 1*ving only speckson tergite 6 where they have well-developedspots, in lacking a mark on the mesopleuraand it h§avig only a faint mark on thefront, but the'differences are so slight as tomake it uncettain whether what is hereassociated with heterulkei as its female issepar4efeM Xkei females, and so Ihave not attempted to make a separationin the key. The allotype of heterulkei isnot quite so fully maculated as is the fe-male Qf cres8oni and is much smaller.

Dianthidium heterulkei varietycornucopiana, new variety

@.-Structurally and in the color of its hairslike the male of typical heterulkei but withreduced maculations.Head with the maculations indicated for

typical heterulkei but lacking the supraclypealtriangIe; thorax without the stripe borderingthie p6terior rim of the scutellum; legs withstripe below on middle femora lacking and thestripes on the outer face of the tibiae much nar-rowed and reduced, discontinuous on front andmiiddle tibiae, shrunken to a basal spot on hindtibiae. The maculations on the tergites of theabdotnen similar to those of the typical varietybut much more deeply emarginate with blackposteriorly, tergites 2 and 5 being quadrimacu-late due to the complete penetration by blackon each of the lateral halves of the band, tergite6 ily blkck and tergite 7 more extensivelyblack basally.O1EGoN.-Queen Mine above Cornu-

copia, elevation 5000 feet, Aug. 2, 1937(E0oinger-Jewett).

8 [No. 1058