i68 
The Ohio Naturalist. 
[Vol. II, No. 2 , 
During the time the female is ovipositing the male is often 
sitting near by on the foliage. At Georgesville, Ohio, June 4th, 
I observed C. mcechus ovipositing on foliage overhanging a mill- 
race ; soon after specimens of the male sex were observed resting 
on the upper leaves of the same plant on which females were 
ovipositing. In a few minutes collecting, a dozen or more speci- 
mens of each of the sexes were procured. The only males of C. 
indus I have ever taken were procured at Columbus, on the 
border of a small pond, where the females were ovipositing. 
The sexes of many species of Tabauus often alight on the bare 
ground of paths or roads that run through or along woods. At 
Cincinnati, June 10th, in company with Mr Dury, we procured 
large numbers of the sexes of different species resting on some 
furrows that were plowed around a woods to prevent the spread 
of fire. We also took the same species resting in paths and roads 
that ran through the woods. Some of these same species were 
also taken from low-growing foliage in sunny places among the 
trees. At Medina, Ohio, males and females of T. vivax and 
trimaculatus were taken while resting in a road that ran through 
a dense woods. 
One of the best places I have ever found to get the sexes of 
Chrysops and Tabanus is in the tall grass that skirts the marshes 
of Sandusky Bay. This grass is the Phragmites of botanists and 
grows to a great heighth by July 1st. On July 6th, at Black 
Channel, when the wind was high I went into a patch of this 
grass that was so dense that I could not use a net to advantage. 
Here I saw an abundance of flies and found that by approaching 
them very slowly I could readily pick the specimens off with my 
fingers. The male and female of T. stygius, nivosus, C. sestuans 
and flavidus and the male of T. affinis and bicolor were taken in 
this way. I found that this same species of grass afforded excel- 
lent collecting wherever found, but most material was procured 
when the wind was high. On the same date and near the same 
place the male of C. flavidus was taken from the flowers of the 
common spatter-dock, and this and sestuans were procured by 
sweeping in the adjacent low-growing herbage. R. C. Osbuni 
informs me that he has had excellent success in collecting Tabanids 
from tall grass near water in his experience. 
Tabanus sulcifrons Maccp is an abundant species in northern 
Ohio during the latter part of July and all of August. So com- 
mon that by actual count twenty-eight specimens were taken 
from a cow in ten minutes, w 7 hile a few that alighted on the ani- 
mal during that time were not procured. August 1st of the 
present year I was at Hinckley, Medina County, and spent the 
day taking observations on this species. In the morning about 
nine o’clock I went to the border of a woods where I had often 
observed the species before. Here males and females were found 
