INDEX 
Pe MOTI CR eke Uk cats Wo soe 18 
abnormis, Acroneuria ......... 82 
ONT hg (GM ia Se ie ated aa rr 80 
Acroneuria, key to species ...... 81 
A HIIOPIIN yon ees Sos bee et ee 82 
Tle PNG kel ies SUR ale Gat aia Recararae 84 
PRMMPAR LOY TUCO 9 sacs. isin ec «ws oes 85 
ES EGY D2. oA ie RO ee eee rae 86 
Jee SA ET d OVA il Se Ae ea 87 
PRTIDCEMCH Acar etic ece 85 sync eg mo: 88 
PT RE ead adds saa. od sch oe 6 3 89 
EMR IROCU UTA rtiace sik sie via « Foss ss ss 90 
BE SUPA Se OTIS! oie s cucu ne Les a 53 
Oa DID Me 3. Shtte ta ong ea «s 111 
Allocapnia, key to species ...... 112 
EPP AMAN ALA na tole Ot gos Pe gt ess 114 
PICISU EA Sot) ie Pes aso Gs ts 115 
RPMI UNC treet hoa Sie wing sno « 116 
sah j (ogee UN UGe Yada A ERO in a 112 
hn, Geta wal A Gees RAD sare ED a 113 
PPEMIN OAL eM Sic efohe cA eis ceca as 114 
PRED DOE ees erie cette RF ser iS, grahs 5 os 58 
Alloperla, key to species ........ 60 
PNPM DOTES LIS Mise © Wvesaute we sieve ace me 8 60 
Pea COPOFAGCIISIS. |) cle 5 sutters 0 wrocs 60 
BAMPUATING Aes 5h 35 etitteiate dtm te ae cs 61 
PAS ETCOIANE 5 )s 4) coe <x aie a) 8 5 Fayed os 61 
AOU esas bak vleo aoae 62 
PD OSLUMLUR et «oie a Sales el 62 
americana, Perlodes............ 44 
SOTA STE TET ole Mile 7 grit ig A ore ae aE 17 
ercuaia, PF eltoperla 54.4 .5..65% 5% 39 
arenosa, Acroneuria ........... 84 
MSDOE Vis cosiirc a aicle sep swale a aisle & 78 
UM NV EC oie a akclo es soy Been « 78 
Dadian, --teronarcella, ... 05.5... % 30 
VCS RT gg 00 TN ee gi a a al 
Dilmmeata,[soperla. 0. occ ss v0 73 
Wilebae PECTONATCYS «2.55 002000 30 
RNa bebe OTL Sot Neko sie 5 oases 54 
ISON COPON Ofsre sige. ey od 06 mac's 20 
TBO COGN ee niece ais coo ee wes oe 16 
PRIEORIIN PA HODOTION oie a{e esse 60 
SO i ad, ae ne a 13 
californica, Acroneuria ........ 85 
californica, Pteronarecys ....... 32 
californica, Taeniopteryx ...... 107 
Ceo A ead Sod) gE ea 47 
ROEM Bates 2. G0a cds sctte ns ace sposePe 8 ae le 109 
PCOETIOIIS CPi es is heey tie aa es > 109 
WES TILEULLG recast (a veo tete tat ea. ws toe 109 
SSRs NOs are is hesn ss cae oo gen 3 Se 22 
Characters, summary of ........ 20 
BE MOEODOTINS Mave visia tie 6 wie oe ahs ok 63 
PEROT ALD OG a igigte cole 5s Feil nut eos « 63 
claasseni, Leuctra ....65-...5: 100 
LG CIO MOTI © sue stite wee a se eet hos 69 
CHGDOR TS ate pak cars os ws ee 68 
Clioperla, key to species ...... 69 
CRCHIOU eras nn tine ac aicke tls so oe 69 
ROO TIAN tes reek © 2aks rane 71 
CU SUNILIS Ae viet we tose ie 3 a ole etol are rps 
clymene, Neoperla ............. 67 
Collecting implements ......... 11 
Collecting -nympus ya. qs ss to's ae 9 
Color, interpretation of......... 1? 
coloradensis, Alloperla ......... 60 
coloradensis, Nemoura ......... 96 
colubrinus, Isogenus ........... 45 
eydippe, Chloroperla .........-. 63 
decepta sLeuctra ici. eho a ot 99 
depressa, Acroneuria .......... 86 
DISU PIE GION IOs hates eer te seers = 3 
Distributionytable, oases ee 122 
dorsata, Pteronarcys .3 0.060: 31 
drymo, Perlinella ... 20... 6.2.0... 79 
ebria, Clioperid q... .¥. 01.28 <': cis 71 
STINE QSREN OS yes tore: ena otsperet ae ern <i 18 
Emergence tablea-. sto: ses 122 
ephyre, Atoperla .............. 78 
Epicranial suture ...........-- 17 
PpiIpnanyikeetee var: soe hee ne 17 
Sxpansa, @ Perla 2, We. ew sistance 59 
Wanailyskeyiese ttt ae ce nnn te 22 
fasciata, Taeniopteryx ......... 106 
five-punctata, Isoperla ......... 74 
Flange, laterali..<...--5..2.'... 18 
OOUENADIES wnt ae. aaate ef mea vere 3 
Porm 0f bodys .8 chy 70s 8 eee, 16, 20 
Fringe, marginal .............. 19 
frontalis, Paraperla ........... 65 
(Senua key oceania lee ae ere a 22 
Gills, taxonomic value of ...... 18 
GHlety pest. ot vce. okey sata: 5 
granulata, Allocapnia .......... 114 
Habitat of Wymphsac-s wae. +m 3 
hagtatass Perla evra aets «cote + 55 
(Plead \ahape Of se wer eae es 20 
Hea de struclure: Olme tet: ste a Wy 
ELypopharyux es skein ote 21 
Illustrations, preparation of ..15, 16 
immarginata Perla i. 6:6). .2 «es 50 
mcisura, Allocapnia |=...2...-.. 115 
InStarsinvmpual so. ss 2 ou ans 8 
IL SOPOHUGI Rt ac aan oe < 45 
COUNTING ist es es ee 45 
ERO POP a Geter ees Oke ay taiie ta te ee (ai 
Isoperla, key to species ........ 72 
ORDER OS LS Ne et ents tararerta cores wo 73 
Ae he PUTO GEL: at oe takers tt otis, ahr 74 
Ex POtersontits 2 utc anes sit. c 74 
LE SISTA tt Al etattcct yale it rcees 79 
