Page. 
Abundance of species. ......... PARI SN 189, 19% 
Merisigryllus: i cisicicicsacc sR. EE 224 
Zéschna brevistyla . 213,22 
REINO EICHe Mere etomecoca ce cunines epranican ane ceen 223 
ROTISERICEA see an cin ties ocacictetacdcetenacs 190, 205, 213, 233) 25% 
CUMMPA RS acer masiektinceme re cee rarest reac rere sa 224 
multicolor. .......... SECCRER COOUROL SO cGORAIC AGbAetip: 223 
Agrion (Calopteryx) maculatum.... .................-- 256 
Pep LOY SUNT beige eeiter a AS MEE IDAD IAC aaeaa EMG aaa 26° 
211 
259 
Sotelo tsls (aia sseeeeseress 187,190, 204,205, 213, 233,251 
233 
220 
224 
Aspia mpicalis ais His dae diel aes Soke ole ae ntcfenncereiad 215,256 
Argia meesta putrida. . . 
PIPER CR LET DY AME ROS fo Ceili s walce's reicisiacietm asics cette te 215 
RAPUICOMIA EY as sicise aaieeiants nedeiseinlice pe oe 210 
Birds as enemies of imagos 222 
Birds as enemies of nymphs 21 
Palontervamcn ccs nce sc sgasieaeng caitiae aes a aetincgie ny ata 256 
Celithemis elisa............... eee a ET tes 253 
ROPETIA e s c sien diet aie winlc ate eater tcl t ciserhtatnercte 
Ceratopogon. . 
MPIC OA NOCA ES acie-tcia.ni- nic sino oiorsipaaialsi tin sins atvpimeeine 190 
Choice of species. a 232 
Gorncealment...5.2.6c00scenses sin si ain vive aieioiet tea wreietatom tees 189 
Gordulegaster mactilatus, .. 0.0 ...0050scccseccscevteeces 205 
Cordulia...... Soghecdcoger coeds im irefe sia Omrefetstetels ee eristeeinete 233 
peer chtcsteccsieanichcie comme erictcrec/omteristetelocetnle sais 194, 202, 204 
CECE a Re Bp ec IG OGRE SCcIeR rca Rac eiterecieycitess 187,188 
(Cypris: <.5.5.. Morateiatbiotetabnlata aieipictalaisioty adie wisielotieiatatareistate’nicts 204, 208 
WS CTU ONS BASES ABS aaa r BSB Er egeeob Siete reee ns 207 
Or eT Es pooscdege gapanmriec ones eheiaiaaleiete aeoseg 204 
claims of injuries... 204 
202 
202 
238 
Ior 
Diving beetles as enemies of nymphs isis) » WAKO: 
Dromogomphus spoliatus......... + 913,215 
MEASURE SRM EMSIQU EN as isle) Ase jalste s\siateleipteinia orctelafd x siaiwie ce oferaie wnat 225 
Dytiscus larvae... <b c.cwcsceccerens SEB aDCceronooue 202, 204, 210 
Economic relations. .... 200, 218 
Enailagma antennatum...........0.00cccseceeees 215,227,257 
HES 3 LUE ASAE SC ACACEARIE Choe CHEN OED AEE COMPAR Ges 257 
RDM yatta (Sta ni o(ty. alc Sra stale ch sraratatai wi cistofa winitie aiclew aisle 215,233,257 
i 257 
257 
BONY ose is ears <eist a sstcaeeata 214, 225, 227, 233,244,257 
signatum..... 227,245,253 
Enemies of imagos....... Seenneteiateme man cers tacit enone 222 
Page. 
Ferbemiies Of ery Abs so ooo saie:s.<ye:ejaiars 0 odie SERNA ele MOTE 209 
PS poieschiraa HOLOS 6/6 io asishatararasesniotwinsefehetctotaro a:b a AME MOTI 233 
Epicordulia princeps. . . 188,190, 233, 243,252 
Erythemis simplicicollis. . . 190, 214, 223,233,241, 254 
Erythrodiplax berenice. ... 233,238 
Hyidence from extyise.. 6s. e0nes ace ckleetoen fase ase 230 
Evidence from feeding nymphs artificially to fish. ...... 230 
Bvidenice froms fish bait... 5.005.000 0.000 otnerad badeeths 225 
Evidence from stomach contents..................2..0.. 226 
UTS ee ee a 220,224 
Food, amount consumed 206 
Food of imagos, Aéschnids 213 
Mamselfly 4..7-5)02005.< 214 
Gomphids. . 4 212 
MAMTA S win «sisi <n ao = bieca St. accoim ee,» «si SRR 213 
217,218 
201 
207 
‘ 208 
Frogs as enemies of imagos........... SSITCMTS. Wis Pak ehetet tetas 224 
Fungi as enemies of nymphs....................0ss0e0e 211 
General conclusions............. Perino ate eho stel a aes 246 
Gizzard teeth...... 196, 199 
Gomphus amniccla 250 
externus. 236, 250 
Sreeerees ss" SM GUAN UN oe. vers cu carcentaeneuek 212 
GIASUIICNES etna mite secre eaten! Seniteter a eas 236, 248 
TG LG Pie Sabb odat BObGAC SUB CR eCnS BOnUee Spam oer Ane 250 
PUMEREUS Soe eee eae cocae Wenner s Ar aeateate he 188,249 
submedianus. .. . 0 . 248,250 
WeSC a oletetcraaratctes<ceeisiecars foie ie ioteehcia,« ate cielelern lovers, olsyera ara nie 213,250 
Hemiptera as enemies of nymphs 210 
Hetzrina americana............ 258 
208 
240 
Hydra fusca as enemy of nymphs....................... 210 
Srna oe Sic aso ct Serctssa(toa Elsie le a Dk sles wt eiwistelein cre toriioreeicie 193 
Emagos'as erlemies Of iMAGOS. 0.2... 6. ce. cee sowie ele esc vie 224 
Pmiavos as fish loom ee sry. hint caicencceretnw occmee ese 231 
Iuiternal Narasites ys cose Ss elaia je cieieishle tcc neers dtcieece 225 
Ischnura (Nehalennia) posita..................000e0ee0e 259 
VErtICALIS, cniocm aces /sistesinaiielsteninice teleue sre 189, 215,227, 233, 258 
Westesleter aes i05 esis spaciercernie icra ad Sone os Wisie - 258 
WeChANVUlAs ae suck teem seicanuicciontactaathise 233,258 
259 
MANNIE NIS see ni rts seme nie Venice a rieh tacoma ine 258 
vigilax .. SSE IPC e ID Sone QunpDLremanon scans acade 215 
Leucorrhinia intacta. 190, 213, 225, 242,253 
Fabel ala auuripesss ..5.c-.<oks cet cates peer eee 238 
Inctiosa. 6 252.5 cbse 187, 190, 191, 214, 222, 233, 237, 239,254 
paletiellnn a: faeces. dten eshte 187, 190, 192, 233, 240, 255 
semilasciata); 0) 2.23. sa pwieg tana ane eames 233 
Life history 192 
Lophonotus 225 
