r 



Syrphidae of Nebraska 49 



County; Omaha, Douglas County, and Nebraska City, Otoe 

 County, from July 2nd to September 14th. 



Mallota cimbiciformis (Fallen). Syrphici., 27; Wiiliston, Synop. N. A. 

 Syrph., 202 (1886); Hunter, Canad. Ent., xxviii, 99 (1896). 



A $ collected at Milford, Seward County, in June. 



Mallota fascialis Hunter. Canad. Ent., xxviii, 100 (1896). 



Six s $ and six $ 9 taken at Warbonnet Canyon, Sioux 

 County ; Bad Lands, mouth of Monroe Canyon, Sioux County ; 

 Pine Ridge, Dawes County, and Lincoln, Lancaster County, 

 between June 8th and July 8th, including the type specimen 

 of the species. 



Mallota illinoisensis Robertson. Canad. Ent., xxxiii, 284 (1901). 



A $ from West Point, Cuming County, June 22nd (P. R. 

 Jones). 



Milesinae 



Milesia Latreille 



Milesia virginiensis (Drury). Illust. Exot. Ent., App., 11 (1770-82). 

 1886. ornata Wiiliston, Synop. N. A. Syrph., 255. 



A $ and three $ $ taken at Rulo, Richardson County; 

 Omaha, Douglas County; Meadow, Sarpy County, and Lincoln, 

 Lancaster County, from June 27th to July 31st. 



Xylotinae 



KEY TO THE GENERA 



1. Thorax with distinct yellow markings besides those on humeri 

 and a single spot on the pleurae. "Wasp flies" 7 



Thorax without distinct yellow markings of the ground color 

 except (certain species of Cynorrhma and Somula) rarely on 

 the humeri and a single spot on the pleurae 2 



2. Apical cross-vein sinuate, forming a sprawling"W"; anal furrow 

 less than one-third the length of anal cell; all basal cells desti- 



155 



