HUNGERFORD: AQUATIC HEMIPTERA. 23 
The area contains a pool in a springy pasture meadow, and 
Winterberry pool, a shallow bit of water overgrown with 
clumps of winterberry bush and encroached upon by procum- 
bent moss-covered masses of the fallen trees of former days. 
This water in midsummer was solidly overgrown by duck- 
_ weed, which made satisfactory collecting difficult. Aside from 
a few Belostomatids this was not good collecting. 
To the west of this pool are two others, nearly circular in 
outline, and occupying depressions doubtless made by tardy 
ice blocks, as the glaciers left the land. These are in a wooded 
tract and their bottoms are deeply strewn with leaves. They 
were good collecting for water bugs in early spring, but with 
the advancing season they were abandoned by the bugs for 
_more favorable breeding places. 
Occasional trips were made to Dwyers ponds and a splendid 
pool on Six Mile Creek, but with less of the regularity followed 
in surveying the others. ; 
TWO POOLS AND TWO SEASONS. 
Attempts have been made to follow very closely the ad- 
vancements of the season in nature. To do this successfully 
certain pools have been selected and surveys recorded at fre- 
quent intervals. From the field notes in this connection one 
is impressed by the varying fortunes of the life in a pool 
during the course of the season. Some of the notes taken in 
connection with two studies are here given because they show 
the history of two pool types, one a temporary Kansas pool 
and the other a permanent body of water in New York state. 
A Temporary Pool. 
The pool described above as the Cattail pool was visited 
regularly from early March until July 28, 1916, when all the 
water had disappeared. This pool was visited November 20, 
1915, at which time there was no water in the pool and little 
of interest found save that the cattails were covered with 
large black plant lice and their orange-colored eggs. A few 
large spiders were hiding beneath the leaf sheaths of the 
cattail.. No water bugs were found, though the debris was not 
sifted. In the Smith pond near-by, adult Notonectids, Corix- 
ids and Belostomids were taken in numbers. | 
The melting of the snows during the winter supplied the 
basin of the Cattail pool with water again, and the first warm 
