September, 1942 
our borders, but several streams which 
seemed to present possibilities of harboring 
this species have not thus far produced 
any specimens. Jsoperla dicala has been 
taken in northern Indiana, and the upper 
parts of the Kankakee River basin in I]l- 
nois present possibilities for finding this 
species. Isoperla duplicata and Leuctra 
sara have been found in Indiana about 30 
miles east of the border of central Illinois. 
Then the chance of finding some other 
species, not to be considered as a possibility 
based on present distributional records, can 
never be entirely excluded. 
Of the North American families of 
stoneflies recognized by me, Illinois lacks 
representatives of but a single family, the 
Peltoperlidae. “Ihe nymphs of species be- 
longing to this family are found in cold 
streams in mountainous or northern states, 
and it is unlikely that a species of this 
family will ever be found in Illinois. 
REVISED LIST OF THE 
PLECOPTERA OF ILLINOIS 
Together With Illinois Literature 
Citations 
PTERONARCIDAE 
Pteronarcys Newman 
Pteronarcys pictetii Hagen 
Frison 1935a, p. 336 (nobilis) 
TAENIOPTERYGIDAE 
Taeniopteryx Pictet 
Taeniopteryx maura (Pictet) 
Frison 1935a, p. 341 (nivalis) 
Taeniopteryx parvula Banks 
Frison 1935a, p. 345 
Taeniopteryx lita Frison 
Present paper, p. 249 
Brachyptera Newport 
Brachyptera fasciata (Burmeister ) 
Frison 1935a, p. 347 
NEMOURIDAE 
Nemoura Latreille 
Nemoura venosa Banks 
Frison 1935a, p. 349 
Nemoura trispinosa Claassen 
Present paper, p. 261 
LEUCTRIDAE 
Leuctra Stephens 
Leuctra claasseni Frison 
Frison 1935a, p. 354 
Leuctra decepta Claassen 
Present paper, p. 257 
Leuctra tenuis (Pictet) 
Present paper, p. 258 
CAPNIIDAE 
Capnia Pictet 
Capnia opis (Newman) 
Present paper, p. 264 
Frison: NortH AMERICAN PLECOPTERA 241 
Nemocapnia Banks 
Nemocapnia carolina Banks 
Frison 1935a, p. 356 (Capnia vernalis 
by ed 
Allocapnia Claassen 
Allocapnia forbesi Frison 
Frison 1935a, p. 363 
Allocapnia forbesi var. cornuta Frison 
Frison 1935a, p. 363 
Allocapnia granulata (Claassen) 
Frison 1935a, p. 364 
Allocapnia illinoensis Frison 
Frison 1935a, p. 365 
Allocapnia mystica Frison 
Frison 1935a, p. 366 
Allocapnia pygmaea (Burmeister ) 
Present paper, p. 265 
Allocapnia recta (Claassen) 
Frison 1935a, p. 367 
Allocapnia vivipara (Claassen) 
Frison 1935a, p. 370 
Allocapnia rickeri Frison 
Prison 19354) pu36/ 
present paper, p. 269 
PERLIDAE 
Atoperla Banks 
Atoperla ephyre (Newman) 
Frison 1935a, p. 377 
Perlinella Banks 
Perlinella drymo (Newman) 
Frison 1935a, p. 380 
Neoperla Needham 
Neoperla clymene (Newman) 
Frison 1935a, p. 381 
Perlesta Banks 
Perlesta placida (Hagen) 
Frison 1935a, p. 386, and present paper, 
Deak 
Acroneuria Pictet 
Acroneuria abnormis (Newman) 
Frison, 1935a, p. 391 
Acroneuria internata (Walker) 
Frison 1935a, p. 401 
Acroneuria ruralis (Hagen) 
Frison 1935a, p. 403 
Acroneuria evoluta Klapalek 
Frison 1935a, p. 395 (arida), and pres- 
ent) paper, p-.27> 
Acroneuria mela Frison 
Frison 1935a, p. 405 (Acroneuria sp. a), 
. and 1937, p. 79 (evoluta) 
Acroneuria perplexa Frison 
Frison 1937, p. 79 
Neophasganophora Lestage 
Neophasganophora capitata (Pictet) 
Frison 1935a, p. 409 
Togoperla Klapalek 
Togoperla media (Walker) 
Frison 1935a, p. 412 
Togoperla kansensis (Banks) 
PrsOnehI37, 8 Pas2,and 19350,9p. 414 
(Togoperla sp. a) 
PERLODIDAE 
Hydroperla Frison 
Hydroperla crosbyi (Needham & Claas- 
sen) 
Frison 1935a, p. 419 
Hydroperla harti Frison 
Frison 1935a, p. 423 
Hydroperla varians (Walsh) 
Frison 1935a, p. 426, and 1937, p. 82 
(pygmaea), and 
