Syrphidae of Nebraska 37 



Apices of femora and bases and apices of tibiae reddish brown. 

 Wings brownish on the basal portion becoming lighter apically. 



Type. Ute Creek, Costilla County, Colorado, 9,000 feet, 

 June 29, 1907 (R. W. Dawson), i . University of Nebraska 

 collection. 



Paratypes. Ute Creek, Costilla County, Colorado, 9,000 

 feet June 24, 1907 (L. Bruner). Two t? c? University of Ne- 

 braska collection. 



Cartosyrphus Bigot 

 KEY TO THE SPECIES 



1. Body entirely shining comosa 



Body not entirely shining 2 



2. Front nearly bare laevifroyis 



(Front with long black pile longipilosa) 



Cartosyrphus comosa (Loew). Cent., iv, 66 (1863); Williston, 

 Synop. N. A. Syrph., p. 44 (1886). 



Two 9 9 taken at Sioux County, and Bellevue, Sarpy 

 County, both in May. 



Cartosyrphus laevifrons (Jones). Jr. N. Y. Ent. Soc, xv, 90 (1907). 



1907. Chilosia laevifrons Jones, Jr. N. Y. Ent. Soc, xv, 90. 



The i type is from Roca, Lancaster County, Nebraska, 

 May 12th, 1906, on Fragaria virginiana (P. R. Jones). 



I append here the description of a new Cartosyrphus from 

 Colorado : 



Cartosyrphus longipilosa n. sp. 



£ . Length 8-9 mm. Face shining black, front and vertex black with 

 long black pile. Antennae reddish brown, arista black and pubescent. 



Thorax metallic, but feebly shining, clothed with dusky yellow and 

 black pile. Pleura with black pile. Scutellum black with bristles on 

 the margin. Wings hyaline with the stigma brown, the last section of the 

 fourth vein much longer than the posterior cross-vein. 



143 



