56 Everett E. Wehr 



2. Antennal process slender, longer than first joint of antennae; 



second segment of abdomen not constricted abbreviata 



Cerioides willistoni (Kahl). Kans. Univ. Quart., vi, 141 (1897). 



1853. Ceria signifera Loew, Neue Beitr., i, 18; Williston, Synop. 

 N. A. Syrph., 262 (1886). 



Three 9 9 collected at Lincoln, Lancaster County, in March 

 and May. 



Cerioides abbreviata (Loew). Cent. V, 48 (1865). 



1886. Ceria abbreviata Williston, Synop. N. A. Syrph., 261. 



Two s £ and one $ collected at Lincoln, Lancaster County, 

 and Bridgeport, Morrill County, from May 17th to July 11th. 



162 



