338 iS. W. Wi/Mston — North American Conops. 



second seo-meiit, posterior segments very faintly dusted on their upper 

 sides. Process of fifth segment below, in the female, not large. Legs 

 red, anterior coxfc blackened in front, without distinct luster. Col- 

 oration of wings as in the preceding species, the cloud along the fifth 

 vein in the outer part of discal cell, often quite obsolete, scarcely any 

 along the sixth. Long. Corp., 10-11""", Colorado (Prof. Snow); 

 Mendocino, Cal. (O. T. Baron). 16 specimens. 



Conops texanus. n. sp. 



$.. . Face and front yellow, anterior border of the vei'tical callosity 

 a little darker, a narrow median stripe, divaricate at base of antenna, 

 brown ; facial grooves not darkened. Cheeks with a transverse 

 brown spot in front, continued as a narrow line along the oral border 

 to the brown of the posterior part. Antennae red, a little darker at 

 the tip of third joint, third joint short, hardly as long as first, dis- 

 tinctly less than half the length of second ; second joint of style pro- 

 jecting strongly, nearly as far as third, third short, conic. Proboscis 

 red, base and tip blackish. Occiput brownish below, posterior orbit 

 with a yellowish wdiite border, broader above, continued as a narrow 

 line behind the eye, and broader on the sides of the face. Dorsum 

 of thoi-ax, pleurjB, and scutellum red, humeri lighter, a narrow median 

 dorsal stripe and triangular spot on the disk of raetanotum, black ; 

 humeri above, a spot on the inner side and behind, with yellow dust, 

 oblique stripe of thepleurse (diffused on the upper half), upper border 

 of disk and sides of metanotum with fainter, less yellow dust. Ab- 

 domen brownish red, with more or less black on upper parts of the 

 segments, first segment distinctly, the others more faintly, dusted. 

 Coxje usually black, satiny luster distinct, but not conspicuous. 

 Legs red, basal halves of tibije yellow, Wings brown and hyaline; 

 costal cell much lighter, nearly hyaline. Discal cell from before the 

 small cross-vein, except a cloud along the fifth vein, and an oval spot 

 in first posteiior cell, nearly hyaline. The penultimate segment of 

 the fourth vein is scarcely three-fifths the length of the ultimate. 

 Long. Corp., 16"'"', long, al., 10""". One specimen, Waco, Texas 

 (Belfrage, Burgess' col). 



Conops marginatus Say. 



.Tourn. Acad. Phil, iii, 82, 1. Comp. W.. ii. 7.^. 

 $ . Face and front waxy yellow, vertex rather brownish black, 

 with a broa<l opaque black ant&rior border, extended as a narrow 



