268 BULLETIN UNITED STATES GEOLOGICAL SURVEY. 



covered on one side with yellow scales (the posterior side on the four 

 anterior legs and the anterior side on the hind legs). Wings brownish, 

 yellowish along the anterior border ; two submarginal cells ; in other 

 words, the geniculate anterior branch of the third vein is not connected 

 by a cross- vein with the preceding vein 5 the cross- vein at the distal end 

 of the discal cell is bisinuated, but bears no stump of a vein. The 

 anteunte of this species are comparatively more slender than those of T. 

 fucata and virgata ; the first joint is clothed with yellowish-white scales. 



Length across the curve of the body 8-9"^°^ Straightened, the body 

 would measure 10-11!™"'. 



^a&._Georgia (H. K. Morrison). One male and two females. 



In Griffith's Animal Kingdom, no jKi^ria is given; but, according to 

 Walker (List, etc., ii, 298), the specimens came from Abbott's collecting 

 in Georgia. The figure given in that work does not show the longitu- 

 dinal yellow stripe on the abdomen : nevertheless, the specific identity 

 can hardly be called in doubt. As I observed before, no regular de- 

 scription is appended to the figure. I suspect that T. leucopyga Wied. 

 and T.fulva are the same species. 



Epibates nov. gen. 



North America contains a number of species of a very elongated, 

 almost Thereva-VikQ shape, of a deep black color, and with rather long, 

 distinctly 2-jointed, palpi. One of these species was referred by 

 Macquart to the genus Apatomyza Wiedemann, the typical species of 

 which is from the Cape. But already Walker (List, etc., iv, p. 1154), 

 who had identified this species in Mr. Abbott's collection from Georgia, 

 suggested that it belongs to a new genus. Although I have not the 

 same species before me, I possess others which are evidently its conge- 

 ners. The disagreement between them and Wiedemann's short descrip- 

 tion consists principally in the structure of the palpi, the last joint 

 of which is not button-shaped, but lanceolate. The discrepancies in 

 the venation, as figured by Wiedemann (tab. iv, f. 1), are only slight. 

 But the general appearance of Apatomyza punctipennis on the figure is 

 not that of the North American species above referred to. The abdomen 

 .in the latter is cylindrical, not tapering, as in the figure ; the wings are 

 longer, the head less close to the thorax ; the statement, " scutellum 

 somewhat prolonged, with almost concave sides," finds no application to 

 the American species ; all the latter are distinguished by a deep black 

 color, which is not the case with the species from the Cape. 



For these reasons, we do not run any great risk in establishing a new 

 genus, Epibates, for those American species. But these species, as far 

 as known, have one character in common, whioh places their generic 

 rights beyond any doubt, if it does not exist in the Apatomyza from the 

 Cape. Four of the species before me of which I have male specimens 

 have the thoracic dorsum beset with minute, rigid, sharp, conical points; 

 this is apparently a sexual character, as it does not exist in my female 



