Cockerell New American Bees. 183 



lower part of pleura, extreme base of abdomen, etc.; abdomen finely punc 

 tured, delicately pruinose, tomentose at extreme lateral base of second seg 

 ment ; the tomentum forming a band across third segment, and covering 

 the following ones, quite ochraceous on the last two ; scape clear red (rest 

 of antennae absent in type) ; clypeus convex, as closely punctured as pos 

 sible; ocelli large ; mandibles bidentate at apex, and with the apical half 

 outside mainly shining orange; maxillary palpi 6-jointed, the second and 

 third very long, the last three small, the last two very minute ; tegulse light 

 ferruginous; wings rather yellowish, nervures ferruginous. The hind 

 tibia and tarsi, with the black dots, the scopa, etc., are exactly as in X. 

 pruiiiosa, but the hind spur is somewhat longer; the inner tooth of the 

 claws is considerably shorter than in pruinosa. The apical plate is broad. 

 Manifestly a Xejinylomut, notwithstanding the palpi. It is smaller and much 

 duller colored than X. jtatrlcia. 



Habitat. Vtah (no other particulars known) ; in the Cresson collection. 

 Loaned through Mr. Viereck. 



Anthophora porterae semiflava var. nov. 



Male. Light hair of thorax above, first abdominal segment and occi 

 put yellowish ; a long light fulvous tuft behind anterior ocellus. A color 

 variety only, but quite a striking one. 



Habitat. Fort Collins, Colorado. May 28, 1904. S. A. Johnson. 



Diandrena nothocalaidis sp. nov. 



Male. Length, 8 mm.; head, thorax and abdomen olive-green; legs, 

 antennae and mandibles black ; pubescence long and erect, pale ochraceous 

 dorsally, white on pleura, cheeks and face except at sides, where it is 

 black ; a little tuft of black hair above the top of each eye; head large, 

 facial quadrangle much broader than long; cheeks broad; tegulse shining 

 black ; stigma and nervures dull ferruginous, the latter quite light; base of 

 metathorax slightly longitudinally wrinkled. In all respects very close to 

 D. chalybsea (Cress.), from the Pacific coast region, and Mr. Viereck sug 

 gests that it may be a race of that insect. As the locality is so far from that 

 of chalybsen, and my quite considerable series is constant, I treat it as a 

 distinct species. On May 17 my wife took two females, one at flowers of 

 Nothocalais, the other at Antennaria. The former is dark bluish-green (the 

 abdomen bluer than the thorax), the latter dark olive-green ; but they are 

 manifestly conspecific. Length, just over 9 mm., differing from D. chalybxa 

 by having the hair of the head all black, except that on the occiput, which 

 is partly pale, with a reddish tint; flagellum entirely black; hair of legs 

 black or sooty; fourth abdominal segment with a rather distinct pale and 

 slightly reddish hair-band; apical fimbria dilute black. The process of 

 labrum is emarginate, and the black facial fovese extend downwards only 

 to the level of the antennae, or an almost imperceptible distance beyond. 



Habitat. Boulder, Colorado, numerous at flowers of Nothocalais, May 3 

 and some days after. T. D. A. and W. P. Cockered. 



