354 Itttnois NATURAL HIstToRY SuRVEY BULLETIN 
nebulosa, T'aeniopteryx, 248 
neglecta, Alloperla, 345 
Nemocapnia, 237, 238, 241, 262 
carolina, 241, 262 
Nemourazs7 esse elecoums42 
(Brachyptera ) glacialis, 251 
californica, 2 
lobata, 261 
maura, 248 
nivalis, 248 
tenuis, 258 
trispinosa, 241, 260, 261 
venosa, 241, 260, 261 
Nemouridae, 237, 238) 239) 24), 260 
Neoperla, 237, 241 
clymene, 241 
Neophasganophora, 237, 240, 241, 302 
capitata, 241, 302 
Nephelopteryx, 248 
Nephopteryx, 238 
nigripennis, Brachyptera, 256 
nimbilis, Alloperla, 347 
nivalis, Nemoura, 248 
nivalis, Taeniopteryx, 241, 248, 250 rea 53 
nivicola, Perla, 265 
nobilis, Pteronarcys, 241, 242, 244 
nona, Diploperla, 302 
nona, Perla, 302 
novascotiana, Alloperla, 345 
Obipteryx, 238 
obscura, Perla, 302 
occidentalis, Leuctra, 259, 260 
Oemopteryx, 238, 250 
(Oemopteryx) alex, Taeniopteryx, 251 
olivacea, Hydroperla, 296 
olivacea, Perla, 296 
opis, Capnia, 241, 262, 264, 266 
opis, Chloroperla, 264 
orata, Isoperla, 323 
oregonensis, Brachyptera, 251 
oregonensis, Taeniopteryx, 25 
Oroperla, 237, 238 
barbara, 287 
orpha, Chloroperla, 339, 340 
orpha, Hastaperla, 338, 340 
pacifica, Acroneuria, 284 
pacifica, Brachyptera, Py F230) 
pacifica, ‘Taeniopteryx, Zot 
pallida, Taeniopteryx, 252 
pallidula, Alloperla, 346 
pallidula, Chloroperla, 346 
Paraleuctra, 256, 257, 260 
claasseni, 256, 257 
projecta, 260 
parallela, Hydroperla, 293, 295, 296, 298 
Paraperla, 237, 338, 339 
frontalis, 339 
parvula, Taeniopteryx, 241, 249, 250 
patricia, Isoperla, 312, 313 
Peltoperla, 237 
arcuata, 246, 247 
brevis, 245, 246 
cornelia, 247 
zipha, 247 
Peltoperlidae, 237, 238, 239, 245 
pennsylvanica, Acroneuria, 275 
perbranchiata, Acroneuria, 281, 283 
Perla, 238, 300, 301, 302 
aestivalis, 302 
alameda, 302 
Vol. 22, Ante 
arid ajyeate 
bilobata, 302 
bipunctata, 301 
carolinensis, 281 
capitata, 302 
crosbyi, 302 
duplicata, 302 
errata, 302 
expansa, 302, 305 
fugitans, 302 
georgiana, 280 
immarginata, 302 
incesta, 290 
innubila, 302 
kansensis, 302 
languida, 286, 301, 302 
luctuosa, 302 
lurida, 282 
lycorias, 283 
maxima, 301 
media, 302 
misnoma, 302 
modesta, 302, 303 
nivicola, 265 
nona, 302 
obscura, 302 
olivacea, 296 
placida, 271 
postica, 292, 293, 302 
ramosa, 302 
sabulosa, 285, 302 
similis, 325 
slossonae, 329 
sorpta, 302 
subvarians, 292 
tincta, 302 
tinctata, 302 
titusi, 290 
trictura, 336 
valida, 272 
varians, 302 
venosa, 302 
verticalis, 302 
xanthenes, 277 
Perlesta, 237, 241 
placida, 241, 271 
Perlidae, 237, 238, 239, 241, 27/1, 3017338 
Perlinella, 237, 241 
drymo, 241 
Perlinodes, 287 
Perlodes, 237, 238, 239, 240, 287, 292, 300, 301 
americana, 288 
aurea, 288 
dolobrata, 289 
ignota, 288 
margarita, 288 
minor, 287 
signata, 290 
slossonae, 287, 289 
tibialis, 287, 289 
yosemite, 287, 290 
Perlodidae, 237, 238, 239, 240, 241, 287, 300, 
30103 11 
Perlomyia, 237 
perplexa, Acroneuria, 241, 277 
phalerata, Diploperla, 302 
phaleratus, Dictyogenus Gry sue 
Phryganea bicaudata, 301 
pictetii, Pteronarcys, 241, 242, 244 
pilata, Diploperla, 305 
pinta, Isoperla, 329, 337 
placida, Perla, 271 
