232 KANSAS UNIVERSITY QUARTERLY. 



and widely produced, their metatarsi narrower than in related species; 

 front femora with five or six long bristly black hairs in a row. Wings 

 with a distinct brownish tinge. — Length 7 mm. 



One specimen, Colorado Springs (August). 



This species differs from related species in the yellow pile of the 

 frontal triangle, the salient tubercle and the very thinly pollinose face. 

 It diifers further from quadratus and hypcrboreiis in the bristly cillia of 

 the front femora, and from chcetopodits in the more produced outer 

 tip of the front femora. 



Catabomba pyrastri Linn. 



More than one hundred specimens, Colorado (Gillette, Nos. 780, 

 1744; F. H. Snow); Estes Park, Colo. (August); Colorado Springs 

 (August); Magdalena mountains, N. M. (August, 6500 to 9000 ft.); 

 Albuquerque, N. M. (August); New Mexico (Gaumer). Apparently 

 more common in New Mexico than in Colorado. While this species 

 is known from Europe, Africa, Chile, and the western states of North 

 America, it has never been taken east of the Missouri river or south 

 of the Rio Grande. 



Eupeodes volucris, O. S. 



More than one hundred specimens of both sexes, Manitou and 

 Estes Parks, Colo. (July and August); Colorado Springs (August); 

 Magdalena mountains, N. M. (August, 8000 to 9500 ft.); Las Cruces, 

 N. M. (Townsend, in May, June, August); New Mexico (Gaumer). 

 This species ranges from an altitude of 3000 or 4000 feet to one of 

 9500 feet or even higher. It is distinctly western and southern, 

 coming no further east than western Kansas, and extending into old 

 Mexico. 



Syrphus arcuatus Fall. 



One male and three females, Manitou Park, Col. (Aug.); two 

 females, Colorado (Gillette, Nos. 1531 and 1607); four malesandtwo 

 females, Magdalena mountains, N. M. (Aug.); one female. New 

 Mexico (Gaumer). A northern species, especially, and common to 

 Europe. 



Syrphus intrudens O. S. 



One male specimen, Estes Park, Col., (Aug.), agrees only fairly 

 well with the description. The black facial stripe is considerably 

 broader than the yellow portion of the face on each side of it; an- 

 tenucC dark brown, third joint reddish below; ])ile of the occiput 

 yellowish gray; pile of the scutellum yellowish; the abdomen is very 

 shining, less so on the second segment. — Length 7 mm. The species 

 was described from California. 



