May, '05] ENTOMOLOGICAL NEWS. 14! 



Eristalis latifrons. Loe\v. 



Several specimens of this species were taken during July 

 and August. I can discern no variation between tin- Wyom- 

 ing specimens and ones taken near Lawrence, Kansas. 



Eristalis montanus \\ ill 



One male specimen captured on Beaver Creek, in September, 

 agrees both with the description and with the type specimen ; 

 also a single male from eastern Wyoming. Osburn reports 

 this species from British Columbia. 



Eristalis flavipes Walker. 



One male specimen of this species taken on Beaver Creek, 

 in September, differs but little from the description given by 

 Williston in his Synopsis, p. 168. The thorax is crossed by a 

 broad black band and the first four segments of the abdomen 

 are covered with pile of a reddish hue. The tibiae are more 

 red than brown. Two specimens in the Kansas University 

 collection show marked variation from the Wyoming speci- 

 men and from each other. In both of these specimens the 

 black stripe is entirely wanting on the thorax and the abdomen 

 in neither specimen shows a reddish tinge. In one specimen, 

 locality not given, the abdomen is wholly covered with dense 

 yellow pile. The other specimen shows a remarkable varia- 

 tion. In general appearance it resembles to a great degree 

 Mallota cimbidformis Fall, but in structure it is essentially an 

 Eristalis. The abdomen is entirely black w T ith black pile, ex- 

 cept that the first segment has a small amount of yellow pile. 



Hab. Wyoming, Wisconsin, and Williston gives Canada. 

 New England, Washington Territory and Minnesota (L,oew). 



Eupeodes volucris O. S. 



Two males and five females differ only in size from specimens 

 taken in Colorado and Arizona. One male measures only 

 6 mm. 

 Helophilus latifrons Loew. 



This species was not noted until the latter part of August, 

 when numerous specimens of both male and female were taken 

 feeding on flowers of Artcmcsia and Solidn^o. The Wyoming 

 specimens uniformily have the median dorsal stripe of the 



