Robertson — North American Bees. 823 



long, strongly retracted, sharply truncate, the truncation sub- 

 cordate; disc with irregular raised lines reaching the apex; 

 wings hyaline, nervures, stigma, and tegulae exteriorly pale 

 testaceous; legs black or dull ferruginous, pubescence pule; 

 hind spurs with about three long teeth ; abdomen black, with 

 slight metallic reflection, shining, segments one and two 

 minutely punctured basally, a triangular patch on each side 

 of base of second, and third and fourth segments clothed 

 ■with rather close pale pubescence; margins of segments not 

 testaceous. Length 7 mm. 

 Illinois; two 5 specimens. 



Halictus testaceus $. 



Head and thorax greenish; apex of clypeus, labrum, man- 

 dibles, except base, flagellum beneath, nervures, stigma, 

 tegulae, knees, tibiae, except blotches on middle, tarsi and 

 abdomen entirely pale testaceous ; face finely and densely 

 punctured, clypeus purplish, more sparsely and coarsely punc- 

 tured ; mesonotum shining, minutely roughened, with minute 

 sparse punctures; metathorax shining, strongly retracted, 

 sharply truncate, posterior face subcordate, disc finely longi- 

 tudinally roughened; hind spurs with about three long teeth ; 

 abdomen shining, with shining margins of segments, impunc- 

 tate, clothed with thin, pale pubescence, which is more abun- 

 dant towards apex. Length 5 mm. 



Illinois; two $ specimens. 



AUGOCHLORA Sm. 



AuGOCHLORA PURA Say. 



Halictus purus Say, Bost. Journ. I, 395, ^(^, 1837, Lee. Edit. II. 773. 



Augochlora pura Smith, Brit. Mus. Cat. Hym. I, 82, 1853. 



Augochlora pura Provancher, Nat. Can. XIII, 206, 9> 1882, 



Augochlora pura Provancher, Faun. Ent. Can. Hym., 706, $, 1883. 



Augochlora labrosa Robertson, Trans. Am. Ent. Soc. XX, 146, 9cf> 1893. 



Augochlora robertsoni Cockerell, Can. Ent. XXIX, 69, 1897. 



$. — Green, reflecting bluish or purplish ; abdomen shining, 

 more evidently tinged with brassy or cupreous ; head densely 

 and finely punctured, clypeus coarsely and more sparsely 

 punctured, anterior margin black ; eyes deeply and rather 

 acutely emarginate; process of labrum subquadrate; middle 



