I 



Biological Papers. 91 



Family Simuliid^. 

 Simulium venustum Say. 



One specimen, taken May 22, 1901. 

 Simulium vittatum Zett. 



This little pest is often abundant the latter part of March and early in 

 April, hovering about and entering horses' and cattle's ears, where it 

 gorges itself on the animals' blood. Last year I found the species 

 quite common as late as November 23. 



Family Stratiomyid^. 

 Odontomyia (snowi) hieroglyphica Olivier. 



Common from early summer until fall, frequenting the flowers of Com- 

 positae. 

 Pachygaster maculicornis Hine. 



I have no specimens of this species in my collection, but in Aldrich's cata- 

 logue of North American Diptera this species is credited to Onaga, 

 Kan. ; so I suppose a specimen was included among a lot of flies sent 

 by me to Professor Hine. 



Family Tabanid^. 

 Tabanus bicolor Wied. 



A few specimens of this fly were taken on swampy ground during June. 

 The male was taken frequenting the flowers of Cicuta maculata July 

 16, 1903. 

 Tabanus costalis Wied. 



This tabanid is common during the hot summer months, attacking cattle 

 and horses. 

 Tabanus dodgei Whitney. 



This fairly common species I have taken only while plowing or listing, 

 when it ,would be seen flying about the working horses. Occurs only 

 in May. 

 Tabanus lineola Fabr. 



A number of Tabanus which I thought were longus, sent to Pi-ofessor 

 Hine, of the State University of Ohio, last fall, were mentioned by 

 him in a communication to me as T. lineola. 



Tabanus (Tectus) sulcifrons Macq. 



This large fly abounds near wooded streams during June and July, where 

 it makes life unendurable to live stock confined in lots near the creeks. 



Family Leptid^. 



Coenomyia furruginea Scopoli. 



Some years this fly is quite abundant among the rank growth of weeds 

 in the timber along the creeks during the first part of June. 

 Xylomyia (Subula) parens Wills. 



A specimen was taken in the timber on French creek June 7, another in 

 our orchard on the prairie June 13, and a third specimen was taken in 

 our house May 28. 

 Chrysopila testaceipes Bigot. 



Quite common on the rank herbage in the heavy timber along the larger 

 streams during the month of June. 



