THE CANADIAN ENTOMOLOGIST. ^ 265 



SOME BEES COLLECTED BY THE REV. G. BIRKMANN AT 



FEDOR, TEXAS. 



BY T. D. A. COCKERELL, BOULDER, COLO. 



Emphoropsis Birkmanni, n. sp. 

 ^. — Length about 15 mm.; similar in size, build and pubescence to 

 E.floridana (Sm.), except that the hair of thorax above is entirely bright 

 orange-fulvous- hair of occiput and vertex (except some black hairs at sides, 

 but including the conspicuous interocellar tuft) is pale orange-fulvous; and 

 the wings are not so dark. From E. riegosisshna, Ckll., it differs by the 

 colour of the pubescence of the thorax, and the long hair at sides of first 

 abdominal segment black (white in rugosissima). The lateral hind margins 

 of the first segment have a white fringe, which is the more conspicuous by 

 contrast with the black in front of it. The hair of the legs, abdominal 

 venter, pleura (except the upper part, as in allied forms), cheeks and 

 clypeus is black. 



Hab. — Fedor, Texas, 2 %'•?, (Birkmann), March 29 and 30. The 

 floridana group includes several closely allied forms, separable in the $ 

 thus : 



Hair of cheeks black i. 



Hair of cheeks white \ of thorax above bright orange-fulvous 3. 



1. Hair of occiput black (Fla., Ga.) fioridana (Sm.). 



Hair of occiput whitish or fulvous 2. 



2. Hair of thorax above yellowish-white (Nevada) rugosissima, Ckll. 



Hair of thorax above bright orange-fulvous (Texas). .Birkmanni, Ckll. 



3. Hair of face and vertex with black intermixed (Wash.) . .pascoensis, Ckll. 

 Hair of face and vertex without black intermixed (Colo., New 



Mexico) n. sp., Viereck, ined. 



E.floridana (Sm.) also occurs at Fedor, the 9 taken March 25, the 

 ^ April 9. The insect, however, is not typical, but may rank as a 

 variety, thus : 



Entphoropsts floridana, var. Fedorensis, n. var. 

 $ . — Hair of occiput black, of thoracic dorsum and first abdominal 

 segment white, with practically no yellow tint ; spurs yellowish-white 

 (black, with reddish ends, in floridana) ; apical plate of abdomen 

 narrower at end. 



^ . — Hair of first abdominal segment with much black (all light in 

 floridana) ; pygidial plate broader at end, truncate, with five transverse 

 file-like lineolse. Although the hair of the thorax above (yellowish-white 



July, 1905 



