THE CANADIAN ENTOMOLOGIST. 135 



NEW ANTHIDIINE BEES FROM COLORADO. 



BY T. D. A. C0CKERP:LL, BOULDER, COLO. 



Aiiihidiuui tenuiflorcF^ n. sp. 



$. Length about lo mm.; black, with pale pubescence, that on 

 head and thorax above faintly yellowish ; ventral scopa sepia-brown, 

 except at the sides, where it is pale ; head with no pale markings, except 

 a round cream-coloured spot above summit of each eye ; mandibles 

 6-dentate, the third to fifth teeth smallest \ lower edge of clypeus crenu- 

 late, with a tooth on each side, followed by a smaller one ; clypeus very 

 densely punctured ; scape all dark ; thorax without light markings ; tegulae 

 cream-coloured in front, and with a small light spot behind ; legs black, 

 tibiae with a light spot at extreme base, and hind tibifc with more or less 

 of a streak at apex ; hair on inner side of hind tarsi coppery-red ; 

 abdominal bands cream-colour, slightly interrupted in the middle, and 

 broadly emarginate above laterally. 



^ . About the same size ; clypeus, lateral marks (extending a little 

 above clypeus), and most of outer surface of mandibles, as well as a stripe 

 on scape, cream-colour ; stripe on middle of anterior tibiae and outer side 

 of basal joint of all the tarsi cream-colour ; tubercles and scutellum wholly 

 dark ; lateral apical lobes of abdomen broadly rounded, not curved 

 inwards or pointed, their breadth about equal to the space between them 

 and the central spine. 



Hub.. — Boulder, Colo. (W. P. Cockerell); i ^ June 12, 1905; i $ 

 same date ; i 9 Aug. 8, iqo6, at flowers of Psoralea tciitiifiora, Pursh. 



1 had confused this with A. emarginatum, Say, to which it is very 

 closely allied ; but it is easily distinguished by the colour of the scopa in 

 the 9 , and the dark tubercles and scutellum in the ,$ . The general 

 structure, venation, etc., agree with emarginatum. The real A. emarg'uia- 

 ttim occurs at Ward, Colorado. 



Anthiditcm porter.ce personulatum, n. sub-sp. 



9. Clypeus entirely black; lateral face-marks small, oblong, not 

 nearly filling space between clypeus and eye ; lateral marks on meso- 

 thorax rudimentary. 



^ . Ground colour of abdomen quite black ; apical lobes and spine 

 entirely black ; yellow marks on scutellum smaller. 



Ilab. — Boulder, Colo. (\V. P. Cockerell); both sexes at flowers of 

 Psoralea tenuiflora, Pursh., Aug. 8, 1906. 



The geniune A. parterre, Ckll., is common at Boulder, visiting 

 Psoralea^tcnuijlora and Griiulclia. The males mostly have the abdomen 

 very red (var. amabilc, Ckll.), but the females do not show this variation, 



April, 190Y 



