94 THE CANADIAN ENTOMOLOGIST. 



nigripennis, Will. ; versipellis, Will. ; parva, Will. ; leucoparea, Loew ; 

 tarda, Snow ; and iucta, Snow. From all these, except parva. Will., it is 

 easily separable by the colour of the legs, which are almost entirely yellow. 

 From parva it is separable by the abdominal markings as well as by the 

 much larger size. 



Chilosia TowJisendi, n. sp. [To Prof. C. H. Tyler Townsend.] 



Male. — Eyes bare, arista very long plumose, face not pilose, scutel- 

 lum with very distinct bristles, third joint of antenna? quadrangular, one 

 and one-fourth times as long as broad, slightly concave above, the angles 

 scarcely rounded. 



Pile of vertex long, black. Front unisulcate, very slightly shining, 

 black pilose. Eyes contiguous for one-half their width. Antennee small, 

 ferruginous, apical third of third joint darker. Arista situated at extreme 

 base of the joint, obscurely reddish, long plumose except at the extreme 

 apex. Face covered, except broadly on the tubercle, with short appressed 

 whitish pubescence, everywhere slightly shining, in profile distinctly 

 concave below the antennae. Tubercle below the middle, very obtuse, 

 more projecting than the antennal prominence. From tubercle to 

 epistoma, which is projecting, deeply concave. Epistoma beneath almost 

 horizontal, in front obliquely truncate. Cheeks coloured and pubescent 

 like the face, narrow with a transverse sulcus in the middle. Occiput 

 olivaceous dull silvery pollinose. Proboscis very small. Humeri obscurely 

 reddish-white pubescent. Dorsum subopaque on the side, shining, with 

 erect black pile which grows into bristles posteriorly and laterally. 

 Pleura shining olivaceous with erect yellowish pile Scutellum shining, 

 finely punctured, with very long distinct bristles on the margin and a 

 fringe of white pile below, elsewhere it is black. Abdomen with sides 

 nearly parallel, laterally with dense, bushy pile, which is white, except at 

 the posterior corners of segments three and four. On the top the pile is 

 sparse, black in the middle and yellowish at the sides. First segment 

 entirely, narrow anterior margin of the second and third, shining metallic, 

 fourth segment everywhere shining, but less metallic. Hypopygium shin- 

 ing, white pilose. Venter distinctly punctate, obscurely reddish laterally ; 

 first segment shining white pilose and pubescent, second opaque with 

 mixed black and white pubescence, third shining, black pubescent, and 

 with very narrow posterior margin reddish. Legs black, mixed black and 

 white pilose, all the trochanters, cox^ and narrow base and apex of the 

 femora, posterior tibise except a wide median annulus and their tarsi 



