244 Annals Entomological Society of America [Vol. XV, 



Brachyopa cynops Snow. 



Length 5 mm. Female. Head light yellowish brown, largely con- 

 cealed beneath glistening pollen; the shining ground color shows just 

 above the antennae and in a stripe on the cheeks, extending from the 

 eye to the mouth opening. Antennas wanting. Dorsum of thorax 

 brown, covered with grayish pollen, anteriorly with two approximated 

 linear blackish stripes; laterally with a broad interrupted stripe. 

 Scutellum light brown, with yellowish pollen. Abdomen but little 

 longer than broad; yellowish gray pollinose; second segment with a 

 circular brown spot on the anterior corners ; the two following segments 

 are marked with corresponding elliptical spots, and, in the middle 

 anterior border with a triangular spot; on the fifth segment are two 

 small round spots. Legs uniformly reddish brown, with light colored 

 pollen and short whitish pile. Wing hyaline, distinctly clouded at 

 anterior cross-vein, on the veins at the anterior outer corner of the 

 discal cell and on the ultimate section of the fourth vein; posterior 

 cross- vein about as long as the ultimate section of the fourth vein, the 

 included angle obtuse. One specimen, Colorado. (Snow). 



Snow does not state the sex, birt the figure is that of a 

 female; also the figure shows the posterior oblique stripes on 

 the thorax as in diversa, but not the spot inside the suture. 



Brachyopa diversa Johnson. 



Abdomen with grayish yellow pollinose posterior bands, the second 

 segment chiefly pollinose. 



Length, 6 to 8 mm. Male. Face and front brownish red, covered 

 with whitish pollen which leavse the oral margin in front, a spot above 

 the antennae and a stripe on the cheeks, shining brownish. Antennae 

 brownish red, the first joint darker, shining. Vertical triangle blackish, 

 with short brown pile; posterior orbits brownish red, pollinose, with 

 whitish pile. In profile the face is concave above, a little convex below, 

 prominent below, and moderately produced downwards. Eyes prac- 

 ticalh' touching, the vertical triangle long and narrow. Dorsum of 

 thorax grayish pollinose, leaving shining brownish stripes as follows: 

 a median pair on the anterior two-thirds, an interrupted stripe on each 

 side of these, and the sides of the dorsum, a slender median one in 

 front of the scutellum, slightly oblique ones running from the corners 

 of the scutellum to just outside the ends of the antero-median stripes, 

 and a spot on the inner ends of the suture. Pleurae brownish red, with 

 lighter pollen. Pile of the dorsum black, but with yellowish pile between 

 the humeri and across the posterior margin: pleurae with yellowish pile, 

 a cluster of black hairs on the upper part of the mesopleurse. Scutellum 

 reddish, yellowish pilose, with a few longer, but not bristly hairs on the 

 margin Abdomen shining black, the first and second segments grayish 

 yellow pollinose; second segment with a median longitudinal line, not 

 reaching the posterior margin, and an oval spot, reaching the sides, on 

 the anterior portion, shining black; third and fourth segments shining 



