306 College of Forestry 
Famity SERICOSTOMATID”. 
Helicopsyche borealis Hagen. Fig. 45, No. 44. 
Common at stations I], III, IV, V, X, XII, XVI, XIX, 
XXI, XXII, XXX, habitat 2, and station XXXI. It has 
been noted in the stomach of the Pumpkinseed. 
This caddis-fly larva forms a spiral case in form so nearly 
like the shell of a mollusk as to have deceived such expert 
conchologists as Lea and Bland. Many years ago Lea (1834, 
p. 104) described the hard case of this insect as Valvata 
arentfera, supposing it to be a mollusk and remarks that “ It 
has the singular property of strengthening its whorls by the 
agglutination of particles of sand, ete., by which it is en- 
tirely covered.” The spiral case and the habit of clinging 
to rocks like the Valvatas perhaps explains, in a measure, the 
error of the early students. They are to-day frequently 
mistaken for snails by amateurs and laymen. This interest- 
ing case is discussed at length by Bland (1865, p. 144). 
Famity Hyproprinip”. 
Hydroptila species. 
Station LX, small kidney-shaped case, not common. 
Faminty Leprocreripa. 
Molanna species. 
Characteristic larval cases were collected at stations XIX, 
and XX XI, habitat 1, c. 
Ocecetis resurgens Walker. 
A few specimens were secured at station XX XIX. 
Leptocella species. 
The long, slender, larval cases of this caddis-fly were com- 
mon. at stations II, VIII, XII,. XIX, XX XI, habitat 1, B, 
1, C, 4, stations XX XIX, XL. It has been found in the 
stomach of the Golden Shiner. 
Leptocerus species. 
A large empty ease of this genus was found at station IX. 
