96 Journal New York Entomological Society. [Voi. xv. 



4. Eristalis inornatus Loew. 



One female from Bad Lands, mouth of Monroe Canon, Sioux 

 Co., Nebraska, which answers to Loew's description except that 

 the pile on the abdomen is nearly all white, the only velvety black 

 cross band on the third segment is the posterior one and it is not 

 emarginate. Length 9.5 mm. Formerly recorded from Red River of 

 the North and Idaho. 



5. Eristalis latifrons Loew. 



Specimens from McCook, West Point, South Bend, Cams, Lin- 

 coln, Nebraska, Hitchcock Co., and Glen, Sioux Co., Nebraska. It 

 is the most common species of Eristalis found in the state. 



6. Eristalis taontanus Williston, 



Two males from Sioux Co., Nebraska. 



7. Eristalis temporalis Thomson. 



Specimens from War Bonnet Canon, Sioux Co., Bad Lands, mouth 

 of Monroe Caiion, Sioux Co., and Glen, Sioux Co., Nebraska. 



8. Eristalis tenax Linne. 



Numerous specimens from Lincoln, West Point, and Glen, Sioux 

 Co., Nebraska. 



9. Eristalis transversus Wiedermann. 



Two males from South Bend and a female from Lincoln, Nebraska. 



23. TROPIDIA Meigen, 



1. Tropidia mamillata Loew. 



Four specimens from Cedar Bluffs, Nebraska. 



2. Tropidia quadrata Say. 



A female from West Point, and one from Lincoln, Nebraska. 

 Formerly recorded from Connecticut, Canada, Washington, New 

 Jersey and New York. 



24. HELOPHILUS Meigen. 



1. Helophilus conostoma Williston. 



One female from West Point, Nebraska. As compared with speci- 

 mens from Pennsylvania and Illinois it has larger and more pronounced 

 black spots on the hind femora and more black on the legs in general. 

 Formerly recorded from Connecticut, New Jersey, New York, Massa- 

 chusetts, Illinois and Canada. 



2. Helophilus integer Loew. 



A female from West Point, and a female from Lincoln, Nebraska. 

 Formerly recorded from New Jersey and New York. 



