RECORDS OF WISCONSIN DIPTERA. 
By S. GraenichER. 
The records given in this paper are based mainly on specimens 
in the collection of the Public Museum of Milwaukee. Besides, 
I have had the opportunity of examining quite a number of flies 
from Tenderfoot Lake, Vilas County, and various other localities 
in the state, contained in the collection of Prof. Wm. S. Marshall 
of Madison, Wis., as also some Tabanids taken by Dr. Geo. P. 
Barth of Milwaukee, at Spider Lake, Vilas County, and elsewhere. 
To both of these gentlemen I herewith express my thanks for the 
kind loan of the specimens for study. 
TABANIDiE. 
At the present time the biting insects are receiving a larger share 
of attention than ever before, owing to the fact that quite a number 
of them figure as disease-carriers between individuals of the same or 
of different species of Vertebrates. It has not been shown, so far, that 
any: of the horse-flies (Tabanidce) are dangerous to man in this par¬ 
ticular respect, but they may be of greater importance in the spread 
of infectious diseases among domestic animals than our present 
knowledge would indicate. 
Chrysops. 
C. callidus Osten-Sacken. In the western part of Wisconsin it has 
been collected at various points along the St. Croix and Mississippi 
rivers. Specimens are on hand from the St. Croix dam in Douglas 
Co., the Nemakagon river and Yellow river in Burnett Co., Hudson in 
St. Croix Co., Genoa in Vernon Co., and Wyalusing in Grant Co. Taken 
in the southeastern part of the state at Army Lake in Walworth Co., 
and at Milwaukee. 
C. carbonarius Walker. This is very close to C. mitis O. S., and 
Prof. Hine 1 has considered the possibility of both representing one 
species only; he refers to the presence (carbonarius) or absence 
(mitis) of a hyaline spot at the base of the fifth posterior cell, as a 
1) James S. Hlne. Tabanidce of the western United States and Canada. 
Bull. Ohio St. Unlv. Series 8, No. 35, pp. 217-248 (December 
1904.) 
171 
