402 Wisconsin Academy of Sciences^ Aris^ and Letters. 
branches, I counted over 1,500 specimens of Agraylea multi- 
punctata. As an item of fish food they are negligible, not be¬ 
cause of their inavailability but because of the difficulty of 
capture. 
The adults are often taken for Microlepidoptera. I have 
bred four of the species listed, two of them in quantities. A 
peculiarity noticed for Ithytrichia and Agraylea is that the 
pupae may swim about in the water for quite a while before 
ecdysis. The adults of both of these species have also been ob¬ 
served to swim actively. 
Family Hydropsychidae. 
Polycentropus sp. 
The species is restricted to the rocky shores and the breaker 
line, altho on several occasions specimens have been taken some 
distance out on plants. The web spun by the larva is a funnel 
with fluted ends, the whole covered by a woven sheet. 
Its relative, Hydropsyche alternans Vorhies, is very abund¬ 
ant in the rapids of the Yahara Spillway, where it constructs a 
loose network into which it anchors some of the flotsam sweep¬ 
ing over the falls. 
Family Molannidae. 
Molanna uniophila Vorhies. 
The larva is an inch long, and builds a tubular case with la¬ 
teral extensions. The larva lives on sandy bottoms and de¬ 
spite its obvious’^ adaptations to strong molar agents is much 
more common in depths below the breaker line than above. 
Family Leptoceridae. 
Leptocerus ancylus Vorhies. 
The larva is small, half an inch or less in length, and builds 
a case consisting of a tube imbedded in a concave shield. This 
species is confined to the rocky shores where it is found on the 
under side of the rocks. 
Leptocerus sp. 
This species which was bred from material obtained from the 
shell zone proved to be different from known American species, 
and may be identical with the European L. fulvus. Its case 
