S. W. Willuton — North Americoji Conops. 3:^9 



median stripe to tlie base of tlie autemue, there divaricating and 

 Ijassing to the sides of the face ; iacial grooves black, cheeks with 

 a yellow space between two black ones. Proboscis bhxck. Antenna' 

 black, first and third joints, below, red, of nearly equal length, scarcely 

 half the length of second, third joint quite nnsymnietrically attenu- 

 ated, about half as broad at base as long, second joint of style with 

 a considerably projecting, rather slender process, third joint modei"- 

 ately long, conical. Occiput black, posterior orbits with a narrow 

 silvery line. Thorax black, scutellum red. Humeri above and on the 

 inner sides with silvery white dust, sides of the metanotum and the ob- 

 lique stripe of the pleura* (indistinct in its upper part) with white dust. 

 Abdomen black, second segment reddened on the sides near the tip, 

 hind borders of all the segments with yellowish dust, rather broadest 

 on the fourth, fifth and sixth lightly dusted with gray above. Legs 

 brownish red, probably often quite blackish, especially near the base 

 of the femur; coxae black with silvery luster. Wings brown on 

 anterior half. Costal cell lighter, outer part of discal cell hyaline, 

 except a narrow cloud along the fifth longitudinal vein ; a more or less 

 large spot in first posterior, hyaline, outer part of marginal cell less 

 deeply colored. Sixth longitudinal vein without brown cloud. 

 Long. Corp., 10-11"^"'. Long, ah, (5-7""". Two specimens. White Mts. 



Conops affinis, n. sp. 



5 ? . Front either wholly yellow, oi- with the vertex rather more 

 reddish, and with a brownish anterioi- border extending as a narrow 

 median stripe to the base of the antennjc and there divaricating. 

 Face yellow, grooves usually quite the same, sometimes a little red- 

 dish near the middle. Cheeks with a yellow spot between the brown. 

 Proboscis red, tip black. Antenmie yellowish red, third joint more 

 or less infuscated above. The relation of the joints very nearly as in 

 raarginatus ; the process of the second joint of style is, however, 

 broader, and the third joint shorter and thicker. Occiput brown, pos- 

 terior orbits with a narrow yellowish line. Thorax red, dorsum with a 

 broad, median, opaque black stripe beginning at the neck and extend- 

 ing beyond the transverse suture, either very narrowly separated or 

 confluent on each with a similar one beginning back of the humerus 

 and extending to near the scutellum. Disk of the metanotum, except 

 the edges, black. Plumeri above, a spot on the inner side, a faint one 

 behind, with golden yellow, or in lighter colored specimens grayish 

 dust. Oblique stripes of the pleurae and sides of the metanotum very 



