HUNGERFORD: AQUATIC HEMIPTERA. 19 
the richest fauna for the student of inland waters. It would 
be interesting to note the characteristics of each pool or stream 
surveyed in the course of these studies, from west to east, but 
time and space will not permit. A few types are described 
here and in the body of the text and a few photographs pre- 
sented to indicate the nature of the water bodies. See Plates 
I and II with attending legends. 
NOTES ON A FEW STREAMS AND STANDING WATERS STUDIED. 
Western Kansas. 
Collections have been available from every county in the 
western half of Kansas, but only the thirteen counties north 
and west of Lane county have been surveyed by the writer. 
This region is drained by three rivers and their tributaries. 
The Republican river and its branches, Beaver, Sappa and 
Prairie Dog Creeks, cover Decatur, Rawline, Cheyenne, Sher- 
man, and most of Thomas counties. The Solomon arises in 
Thomas county and passes through Sheridan, while the Smoky 
Hill drains Wallace, Greeley, Logan, Wichita, Scott and Gove 
counties. 
Most of these streams are intermittent, often sinking into 
the sands of their channels during a dry spell. At the time 
collections were made near Russell Springs, in Logan county, 
the Smoky Hill river was a stream eighteen inches broad and 
from one-half to three inches deep on a bed of sand several rods 
wide. A few pools were found where water bugs could be col- 
lected. Several weeks later, when we were camped farther up 
the river in Wallace county, the stream had ceased to flow. 
The camp was set under a few willow trees on a sandy flat 
some distance from the channel and several feet higher than 
the normal water mark. This sandy stretch, close to the place 
where the water should have been, was splendid collecting for 
Toad bugs. There was no vegetation or other shelter to ob- 
struct collecting. A few nights after arriving at this place a 
rain up-stream caused a great change. The entire flat, includ- 
ing our camping place was covered with water very shortly. 
We concluded, from this experience, that the vicissitudes of 
the inhabitants of the sandy stretches bordering western Kan- 
sas rivers must evidently be great—one hour upon dry sand 
and the next submerged beneath a seething torrent of water. 
