ANNALS 
OF 
The Entomological Society of America 
Volume VII DECEMBER, 1914 Number 4 
THE BIOLOGY OF THE NET-SPINNING TRICHOPTERA 
OF CASCADILLA CREEK.* 
Miss AticE Ayr NOYEs. 
CONTENTS. 
PAGE 
TREE YGIGEIORD fh at eel” S SP ge pa cane cae oe SER Te gee CEI a es 251 
II. Catching-nets of the Families Hydropsychide, Philopotamide, 
Polycentropide. 
feria am btn OOM Sy, Cll Gl ao nm se tereman i aM Sata oak ocd blac oe 252 
ipa yaa SONI PARC ES Goto cts ohn ables tse Seas W sates be Dae eo 259 
Pammhyge Oly CenpLOmidass aes eos cece A victen Seed be Parthia tree env 260 
Meee eM NG chi Ce OLUCa LOM spepan tet sn?2\s oo eet Mew oc byte ale ys se caw bets 265 
EMC en a RO Le Mae Re tN ee Se ele wie a als bone arls a nds #4 O98 Lvs we 266 
Venvexperimental work onklydropsyche Nets:..c.. 0... 2.2. ees te cee 268 
WIL, Lull Eroyesreeyoy ny75 Sees yes lice tere nenin CDs eR etre 271 
I. INTRODUCTION. 
The net-spinning Trichoptera are confined to the members 
of the old Family Hydropsychide, which has been subdivided 
(Ulmer 1909) into four families, Hydropsychide, Philopota- 
midz, Polycentropide, and Psychomyide. Nets of some of the 
genera of the first three families have been described, but 
- as far as is known, larvae of the Psychomyide spin no catching- 
nets. (Wesenberg-Lund, 1911). The only nets described in 
this country up to this time have been of the genus Hydropsyche. 
Most of the work on the catching-nets has been done within the 
last six years and almost entirely by Danish investigators. 
Contribution from the Limnological Laboratory of Cornell University. 
251 
