Syrphidae of Nebraska 27 



at Omaha, Douglas County, August 26th, by L. T. Williams, is 

 in the collection. 



Didea Macquai't 



Didea fasciata var. fuscipes Loew. Cent., iv, 82 (1863) ; Osten Sacken, 

 Cat. Dipt., 245, note 212 (1858) ; Williston, Synop. N. A. Syrph., 

 89 (1886). 



One i and three 9 9 taken at Harrison, Sioux County ; 

 Monroe Cayon, Sioux County, and Omaha, Douglas County, 

 between June 1st and August 15th. 



Eupoedes Osten Sacken 



Eupoedes volucris Osten Sacken. West. Dipt., 329 (1877); Williston, 

 Synop. N. A. Syrph., 65 (1886); Snow, Kans. Univ. Quart., iii, 

 232 (1895). 



This species is a very common one in the state. Specimens 

 have been collected at Monroe Canyon, Sioux County; Harri- 

 son, Sioux County; Glen, Sioux County; Crawford, Dawes 

 County; Mitchell, Scottsbluff County; Sidney, Cheyenne 

 County; Loup City, Sherman County, and Lincoln, Lancaster 

 County, between May 12th and September 1st. 



Paragus Latrielle 



KEY TO THE SPECIES 



1. Scutellum with a yellow border; face of male without a black 

 median stripe; front of female narrow above..; bicolor 



Scutellum without a yellow border; face in both sexes with a 

 black median stripe; front in female of nearly equal width 2 



2. Abdomen with more or less red on the dorsum 3 



Abdomen wholly greenish black angustifrons 



3. Vertical triangle in male large tibialis 



Vertical triangle in male not unusually large dimidiatu^ 



133 



