GENERAL INDEX. 
483 
Page 
Hayden Lake, Idaho — Continued. 
description 84,85 
Page 
Hydrophilus triangularis, as menace to fish-culture 35 
destruction of 35 
fish 85 
plankton 85, 86, 127 
Hydroporus.- 242,243,265,285 
consimilis___ 237 2fi3 
temperature 85,116,117 
Helophorus 332 
lacustris 263 
distribution in Fairport fishponds 263 
migration 237 
Hvdroscapha 333 
lineatus ". 263 
Hydrous.... 9.18.19.21.29.30 
Henry Lake, Idaho: 
description 88 
fish food in 74, 88 
mackinaw trout in 88 
plankton 88,128 
thermal changes and gas conditions of 67, 117 
heron, green 34, 247 
heros, Eupomotis 253 
herring, toothed 253,254 
Hildebrand, Samuel F. : Annotated list of fishes collected 
in vicinity of Augusta, Ga., with description of a new 
darter 1-8 
hirundinella, Ceratium _ _ 399, 401, 406 
hog molly 253 
horned grebe : 34,247 
hornwort 265 
hornyhead _ 3 
horsefly, black, as enemy of beetle pupae 246 
hudsonius, Notropis 3,253 
humilis, Lepomis . 211 
Hyalodaphnia 417 
Hybognathus nuchalis 3 
Hyhopsis kentuckiensis... 3,253 
hybridus, Dytiscus 237,238,247,263 
hydra, as beetle eaters 244 
Hydra, sp 400,409 
Hydrobiidse __ 233 
Hydrobius 332 
striatus 
Hydrocanthus iricolor „ 263,1 
niger 263,285,1 
adult, description and habits of 
distribution in Fairport fishponds 
318 
eggs - 285 
larva, description and habits of 285 
pupa, description of — 286 
pupation - 286 
Hydrocharis obtusatus _ _ _ 314 
Hydrochelidon nigra surinamensis 34 
Hydrochus squamifer 263 
Hydrodictyon ... 31,266 
reticulatum 401 
Hydrophilidse r 10, 11,31, 
232, 233, 235-239, 241-243, 247-250, 253-255, 257, 258, 263-269 
eggs, formation of ^ _ 10,11 
egg case, spinning of — 11,29 
in aquaria 10 
Hydrophilus.. _ . 9, 31, 250, 251, 260, 314, 333, 334 
as a fish eater 250 
glaber _ 326 
lateralis 321 
mixtus— 329 
obtusatus 238, 263, 314, 315 
adult, description of. 315 
distribution 238,263 
egg case 314 
larva, description and habits of 314 
pupa, description of. 315 
ovatus. 27 
triangularis 34,35 
adults, mating of 35 
31, 32, 34, 236, 243, 250-252, 260, 262, 267, 332-334 
as fish eaters 251 
as food for dragonfly nymphs. — 243 
locomotion of. 236 
(Hydrophalus) triangularis, Life history of. 9-38 
piceus 9,22,24,25,333 
cap attachment on egg case 333 
triangularis.. 10,11, 
12, 237, 238, 242, 245, 247, 249, 252, 263, 266, 332 
adult. 26 
antennae 27 
birds as enemies of. 247 
description 26 
external characters. 27 
food... 29 
front tarsus of male 29 
mouth parts 28 
respiration 29 
turtles as enemies of 247 
as fish eater 249, 252 
as food for bass 252 
distribution 238,263,266 
economic relations 30 
egg cases... 10-21,29 
mast of 12 
enemies of adults, eggs, larvae, and pupae.. 32-34 
larva 13 
abdomen 17 
breathing.. 18 
description 13 
enemies of 32-34,242 
food and feeding 19 
head 15 
locomotion 18 
menace to fish. 21 
mouth parts 16 
thorax __ 17 
mating and egg laying. 10 
migration. 237 
pupa.. 10,21 
description.. 22 
enemies of. - 32-34,245 
pupation. 21,22 
Hydrovatus pustulatus 238, 244, 263 
distribution 238,263 
larvae, turtles as enemies of 244 
Hymenoptera 243,256 
hymenopterous parasite 245 
Hyodon tergisus 253 
hypelasma, Anuraeopsis 400 
Hypentelium nigricans. 2 
Ichneumon flies 32 
ichneumonid parasite 245 
Ictalurius punctatus 2, 250, 253, 258 
Ictiobus bubalis 253,258 
eyprinella 21, 250, 253 
urus 253 
Ikatan Bay, salmon-tagging experiments at 43-45 
illinoensis, Plseodorina 399,402,404 
Potamogeton, occurrence in ponds at Fairport, Iowa. 265 
