Syrphidae of Nebraska 25 



This species has a wide distribution over the state. Twenty- 

 seven s $ and twenty-three 9 9 have been taken at Rulo, 

 Richardson County; Omaha, Douglas County; Meadow, Sarpy 

 County; Weeping- Water, Cass County; South Bend, Cass 

 County; Lincoln, Lancaster County; York, York County; 

 South Sioux City, Dakota County; Concord, Dixon County; 

 Broken Bow, Custer County; Glen, Sioux County; Monroe 

 Canyon, Sioux County, and Mitchell, Scottsbluff County, be- 

 teween May 8th and August 25th. 



Sphaerophoria St. Fargeaux and Serville 



KEY TO THE SPECIES 



1. Lateral thoracic stripe ending at the suture; face entirely yel- 

 low; abdominal bands beyond the second segment present in the 

 female, usually obsolete or wanting in the male; length 8 

 mm cylindrica 



Lateral thoracic stripes continuous scripta 



Sphaerophoria cylindrica (Say.) Amer. Ent., 1 (1824); Williston, 

 Synop. N. A. Syrph., 105 (1886). 



Twenty-nine S s and twelve 9 $ collected at the following 

 localities : Omaha, Douglas County ; Bellevue, Sarpy County ; 

 South Bend, Cass County; Lincoln, Lancaster County; Fair- 

 mont, Fillmore County; South Sioux City, Dakota County; 

 Concord, Dixon County; West Point, Cuming County; Cams, 

 Keyapaha County; Glen, Sioux County; Monroe Canyon, 

 Sioux County; Harrison, Sioux County, and Mitchell, Scotts- 

 bluff County, between May 9th and August 31st. 



Sphaerophoria scripta (Linnaeus). Fauna Suec, ended., 449 (1746); 



Williston, Synop. N. A. Syrph., 107 (1886). 



Three $ $ and two 9 9 taken at Brock, Nemaha County, 



and Lincoln, Lancaster County. The $ from Brock and two 



9 9 from Ute Creek, Colorado, have the coxae and the base of 



the femora black ; this is probably only geographical variation. 



131 



