268 THE CANADIAN ENTOMOLOGIST. 



NOTES ON ANDRENA. 



BY S. N. DUNNING, HARTFORD, CONN. 



Andrena Hallii, n. sp. 



$. — Lenth, 14-17 mm. Black, shining; pubescence black with 

 patch on vertex, the prothorax, mesothorax (excepting posteriorly where 

 pubescence is not so thick and has black mixed with ferruginous, forming 

 a more or less distinct black-appearing band between the tegulas), scutel- 

 lum and postscutellum bright ferruginous, thick, entirely obscuring 

 punctures on thorax. Clypeus shining, large quite close punctures^ a 

 median line impunctured ; antennae black, third joint eqtial to fourth and 

 fifth combined; metathorax not shining, closely and more finely punctured; 

 scutellum with two smooth shining spots anteriorly, a few scattered 

 punctures near-by, otherwise roughened ; postscutellum and metathorax 

 roughened, enclosure triangular, distinctly outlined, carried to a point on 

 posterior face, sometimes faintly and irregularly wrinkled in fore half, last 

 half impunctured. Abdomen without hair bands, a few long scattered 

 hairs on segments 3-4, 5th seg. pubescent and protuberant as is vidua; 

 anal fimbria heavy, black ; segments 1-4 depressed posteriorly, the first 

 very slightly if at all, the remainder one-third or one-half of their length ; 

 fine scattered punctures on seg. 1-3, remainder impunctured ; a sweep of 

 hairs below like vichia. Wings dusky throughout, a violaceous reliection, 

 otherwise like vicina ; stigma and nervures piceous or very dark brown. 

 Claws bifid, rufous ; spurs black. Basal process of labrum prominent, 

 emarginate. 



Three females. Pullman, Wash. (coll. C. W. Piper), and Moscow, 

 Idaho (J. M. Aldrich). 



It differs at once from vicina by pubescence and punctures of 

 clypeus. 

 A. MARINE, Rob. 



Three females. Ames, Iowa (E. D. Ball) ; one from flowers of goose- 

 berry, May 6th. 

 A. RHODURA, Ckll. 



Two females on Salix, April 25th, at Hartford, Conn. 



A. CASAD/E, Ckll. 



Two females on Holodisctis discolor, Evergreen, Colo, (about 7,000 

 feet), July 16. One specimen shows the second segment rufous through- 

 out. Prof. Cockerell thinks a large series may show this species to be 

 synonymous with prunoriim. 



