THE CANADIAN ENTOMOLOGIST. 133 



ON SOME BEES OF THE GENUS AUGOCHLORA. 



BY E. S. G. TITUS, FORT COLLINS, COLO. 



Augochlora Coloradensis, n. sp. (subg. Augochlora). 



o. . — Green, often tinged with purple ; face finely and confluently 

 punctured above the base of the antenna?, more coarsely, confluently so 

 below, supraclypeal space sometimes not confluently punctured ; clypeus 

 with large punctures, black at tip ; basal process of labium subquadrate, 

 broadly rounded, rufopiceous ; mandibles black, rufous at tips ; antenna? 

 black, flagellum near the tip fulvotestaceous beneath ; striation of the disc 

 of the metathorax reaching to the summit, posterior truncation rounded 

 above, lateral portions rounded, truncation not shining, rugosely punctured ; 

 tegulae, often with a black dot in the centre, stigma and nervures 

 testaceous ; legs piceous, femora and tibiae sometimes with a greenish 

 cast, knees testaceous, tips of tarsi generally inclined to rufous ; hind 

 tibial spurs of posterior leg finely serrated ; abdomen shining, polished, 

 finely punctured ; ventral segments black ; pubescence of face, sides of 

 thorax, tarsi partly, and abdomen, whitish ; scutellum and first dorsal 

 abdominal segments very fine and short, margins of segments fringed with 

 white hairs ; hair on tarsi often inclined to be rufous. Length, 6-7 mm. 



o' . — Green ; clypeus sometimes confluently punctured, slightly 

 produced, anterior edge of clypeus and posterior portion of labrum white, 

 labrum polished, testaceous anteriorly, slightly notched at tip ; mandibles 

 black at base, yellowish in middle and distinctly rufous at tips ; antennae 

 black, flagellum, except last joint, yellowish testaceous beneath ; thorax 

 finely closely punctured, with the impressed lateral and central longitudinal 

 lines smooth and distinct; striation of disc of metathorax as in female; 

 posterior truncation distinctly bounded by carina ; groove shallow ; 

 tegula?, stigma and nervures testaceous, wings hyaline ; legs green, knees 

 testaceous, anterior tibiae with the green restricted to a line posteriorly, 

 two posterior pairs of tibiee at the tips, and all the tarsi, darker toward 

 tips, yellowish testaceous ; abdomen shining, rather closely and finely 

 punctured, apical portion of first segment somewhat constricted ; ventral 

 segments black, fourth widely emarginate ; face, clypeus, cheeks, scutellum, 

 legs and abdomen dorsally, sparsely clothed with whitish pubescence, 

 ventral segments with fine short sparse white pubescence. Length, 5-6 mm. 



Described from numerous females : Ft. Collins (5,000 fi.) and 

 Boulder in May and June, Ft. Lupton (4,500 ft.) in July ; and two males 



