38 KANSAS UNIVERSITY QUARTERLY. 



and in a stripe on the cheeks, extending from the eye to the mouth 

 opening. Antennae wanting. Dorsum of thorax brown, covered 

 with grayish pollen ; anteriorly with two approximated, linear, black- 

 ish stripes ; laterally with a broad, interrupted stripe. Scutellum light 

 brown, with yellowish pollen. Abdomen but little longer than broad ; 

 yellowish gray poUinose ; second segment with a circular brown spot 

 in the anterior corners ; the two following segments are marked with 

 corresponding elliptical spots, and, in the middle of the anterior bor- 

 der 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 penultimate section of the fourth vein, the included angle 

 obtuse. 



Length 5 millimeters. One specimen, Colorado. 



Eristalis latifrons Loew. 



Numerous specimens, Colorado. The commonest Syrphid of the 

 mountain meadows. Some specimens have very indistinct brownish 

 spots on the second abdominal segment, and, when this is the case, 

 the middle of the wing generally shows a brown spot, and brown 

 clouds along the anterior veins between the spot and the base of the 

 wing. 

 Eristalis brousi Williston. 



One male specimen, Colorado. 

 Helophilus latifrons Loew. 



Numerous specimens, Colorado. 

 Xylota flavitjbia Bigot. 



Eight specimens, Colorado. The glistening pile of the face and 

 front varies from white to a golden yellow. On the dorsum of the 

 thorax purplish stripes are distinctly visible. The fourth segment of 

 the male abdomen is often red, as in the female abdomen. 



Syritta pipiens Liiinc 



Eight specimens, Colorado. 

 Oriorrhina umbratilis Williston. 



A single, male specimen, collected by Mr. W. J. Coleman, at Law- 

 rence, and agreeing exactly with the description. The only other 

 known specimen of this species is the type, at Washington, from 

 Connecticut. 

 Spilomyia quadrifasciata Say. 



Seven specimens, Lawrence, Kansas, (F. H. Snow and E. S. 

 Tucker). The species has not hitherto been recorded west of New 

 York. 



