THE CANADIAN ENTOMOLOGIST. 289 



NEW SPECIES OF NORTH AMERICAN ASILID^. 



BY E. A. BACK, B. SC, AMHERST, MASS. 



Dasyllis cinerea, sp. nov. — Black, shining, with sHght bluish 

 reflection ; head, thorax, tip of abdomen, and legs with cinereous hair and 

 pile. Length, 12-15 nini. 



c? ?  — Head black, face cinereous pollinose, mystax and vibrissas long, 

 composed of moderately-dense cinereous hair, with the exception of a few 

 black ones for the most part confined to the oral margin, but sometimes 

 extending up on the facial gibbosity ; ocellular tubercle prominent with 

 black hair ; occipito-orbital hairs fine, black and gray, the latter 

 predominating; beard dense, silky, of same gray colour; palpi small, 

 black-haired; antennae black, first two segments with black and gray 

 hairs. Thoracic dorsum clothed with short gray pile, longer behind ; 

 lateral margins with fine black hair ; scutellum, with the exception of a 

 few short black hairs on the anterior, and a fringe of longer hairs of same 

 colour on its posterior margin, bare and shining black ; halteres yellovyish- 

 brown. Abdomen with lateral margins of segments 1-4 with moderately 

 long gray and black pile ; dorsum of same segments sparsely clothed with 

 fine black pile, not noticeable without the aid of a lens. Segments 5-6, 

 excepting the middle anterior portion of segment 5, with dense, 

 procumbent, yellowish-gray, sometimes brassy-yellow pile. Venter with 

 spare, long, gray pile ; ovipositor of female with long pile of same colour, 

 sometimes is part black ; genitalia of male with short black pile and a 

 itw longer gray hairs. Legs black ; cox^e, femora, on the upper and 

 posterior surfaces, and the tibi?e, excepting the distal third of the posterior 

 pair, with long gray pile and hairs ; scattering hairs and bristles on all the 

 legs, a patch of short pile on the upper distal portion of the posterior 

 femora, and the clothing of the distal third of the posterior tibiae, and of 

 all the tarsi, black. Wings hyaline, slightly fuliginous along the black 

 veins. A distinct bulla on vein at base of discal cell. 



Described from two males and one female from Southern Fines, N.C., 

 collected in March by F. Sherman, and one female from Karnes, N. Y., 

 collected June 18. Four co-types deposited as follows : A male and 

 female in the collection of the Massachusetts Agricultural College, one 

 male in the collection of the N. C. Experiment Station, and one female in 

 the collection of the N. Y, State Museum. 



