222 ERNEST A. BACK. 



Habitat.— Tiiton, Ga. (Sept. 9, 1896). Collected by Mr. G. 

 R. Pilate and sent to Prof. Johnson by Dr. Garry de N. Hough. 



The type specimen is the only one of this species now known. 

 Prof. Johnson says, that aside from the difference in coloration, 

 "that this species is distinguished from tristis in having the 

 thorax noticeably narrower and the third segment of antennae 

 shorter and proportionately broader and entirely red." He 

 also calls attention to the "great difference between the two 

 species in their time of appearing, which shows that they are 

 in no way related, as all data pertaining to the Asilidae indicate 

 but one seasonal brood." In connection with this last state- 

 ment, I would call attention to my capture of tristis on Aug. 

 29, 1908, at Turkey Lake, Fla. 



PSILOCURUS. 



Psilocurus Loew, Berl. Ent. Zeit., XVIII, 373, 1874. 

 Orthoneuromyia Williston, Kans. Univ. Quart., II, 67, 1893. 



Scutellum with two or four stout bristles; veins at outer 

 ends of discal and fourth posterior cells parallel or nearly so. 



Head twice as broad as high, face moderately narrow, nearly 

 flat, on the oral margin slightly convex and more prominent; 

 mystax composed of bristles confined to the oral region, the 

 face as far as the antennae with fine hair. Front somewhat 

 broader than face, well depressed, and with a rather deep 

 furrow on each side extending from the vertex to the antennae. 

 Ocellar tubercle prominent without well developed bristles. 

 Antennae short, first segment cylindrical, not swollen on the 

 underside, above and below with short pile and beneath with 

 a long bristle; second segment likewise cylindrical, more slen- 

 der, subequal or shorter, with short pile; third segment oval, 

 scarcely longer than the first two segments taken together; 

 style entirely rudimentary. Occiput with pile and bristles. 

 Dorsum of thorax and scutellum everywhere covered with 

 short, down-like, dense pile; on each side of dorsum are three 

 stout bristles located immediately before and behind the 

 transverse suture and upon the posterior callosity respectively. 

 Scutellum with two erect stout bristles upon the posterior 

 margin; sometimes there is another pair, outside these, which 



