64 WILLISTON: NEW DIPTERA. 



that the abdomen may be described as black, with a more or less 

 elongated yellowish red spot in each side of the segments, toward the 

 front. The first segment is black, with a light yellow anterior margin. 



Stygeropis bergrothi, n. sp. 



Male. Black, grayish dusted, with light colored pile. Antennae 

 about as long as the mesonotum, the basal joints slightly redilish. 

 Rostrum one-half the length of tlie head; occiput thickly gray dusted. 

 Thorax and abdomen uniform in color, and wholly opaque; a slender 

 dorsopleural line, the minute humeral callosities and the sides of the 

 scutellum, yellow or yellowish; forceps of hypopygium yellow; stem 

 of halteres yellowish, the knob black. The slightly thickened distal 

 end of the femora, the tibiae in large part, and all of the tarsi dark 

 brown; femora elsewhere reddish yellow; the basal portion of the 

 tibiae brown; tarsi longer than the tibiae, the metatarsi nearly twice 

 the length of the remaining joints together. Wings uniformly subin- 

 fuscated. 



Length, 12 mm. 



One specimen, Alaska, I'niversity of Kansas. 



Lordotus pulchrissimus, n. sp. 



f'emale. Black, almost wholly concealed beneath dense and long, 

 bright yellow pile, that of the pectus and base of femora white. Face 

 and front in ground-color opaque, grayish white, the pile more whitish 

 below. Antennae black, the second joint yellow; thirtl j(jint shorter 

 than the first two together, the second a little shorter than the first. 

 Proboscis nearly as long as the front femora and tibiae together. 

 Thorax and scutellum opaque, tlie latter convex, without groove or 

 impression. No stripes visible on the mesonotum. Abdomen shining, 

 the covering composed wholly of long and dense pile, uniform in 

 color. Legs light yellow, the tarsi black or blackish; bristles of the 

 tibiae black; pile and tomentum of the femora white. Wings pure 

 hyaline. 



Length, 13-15 mm. 



Two specimens, Reno, Nevada (Hillman). 



Lordotus puella, n. sp. 



Male. Black, clothed throughout with grayish yellow pile. Legs 

 black. First two joints of the antennae together a little shorter than 

 the third, the second joint but little longer than broad. Abdomen a 

 little shining beneath the pile; without tomentum. Tibiae slighty 

 reddish. Wings nearly hyaline, the costal and subcostal cells yellow. 



Length, 1 1-12 mm. 



One specimen, California (Baron). 



