478 
GENERAL INDEX. 
Page 
dace , 3 
horned 253 
Daphnia.. 29,417 
arcuata . 400,406 
longispina.. 400,405 
pulex 406 
pulex v. pulicaria _ _ _ 400, 406 
retrocurva 400, 401, 403, 406, 410, 411, 414 
darter, new, description of_ 1-8 
Frick’s 7 
fusiform... 8 
Iowa 254,255 
Deer Lake, Wash.: 
depth, temperature, and dissolved gases 116 
description- 84 
fish 72 
mackinaw trout in.. 73, 74 
plant life 84,126 
deflexus, Colurus 409 
delicatissima, Synedra 399,401,402,404,408,410 
demersum, Ceratophyllum 361 
denticulatus, Scenedesmus 461 
deses, Euglena... 461 
Desmidium sp 399 
desmids 442,464 
despectus, Creniphilus 263 
detritus 375, 376, 400-405, 410, 412, 444 
definition of 376 
Mississippi River, volume in 375, 376 
Diaphanosoma leuchtenhergianum. 400, 405, 406, 410 
diaphanus, Fundulus 253 
diaphanus menona, Fundulus 254 
Diaptomus — 387 
Diaschiza gibba 409 
diatoms - 401, 411, 417, 441, 442, 444, 460, 461, 464, 468 
Difflugia 461,465 
corona 399, 401, 404 
lebes.— 399 
pyriformis 399,403-405 
difiusus, Enochriis 263,313,317,320,321 
Philydrus 320 
digestus, Creniphulus 263 
Diglena forcipata 409 
dilata, Euchlanis 400,409 
dimorphus, Scenedesmus „ 461 
Dineutes 235,240,250,260,302 
americanus. . . 235, 237, 246, 250, 259, 263, 266, 271, 302-307, 329 
adult, description and habits of 306 
as food for fish 259 
distribution in Fairport (Iowa) fishponds 263 
eggs 302 
fish as food of... 250 
imperfect pupation 246 
larva, description and habits of 304 
migration 237 
occurrence in ponds 266 
pupa, description of. 305 
pupal chambers of 235 
pupation 305 
assimilis 33,302 
locomotion of 235 
dineutis Ashmead, Cyrtogaster 246 
Dinobryon 465 
setularia 461 
Dinocharis paupera 400 
375 
Diptera 243,254,255 
dipterous parasites 245 
Page 
distans, Coceoneis 408 
Diurella stylata 400, 409 
diversicornis, Sehizocerca 400 
dobsonfly, as bait for bass.... 252 
dolomieu, Micropterus 253 
Donacia 247,332 
aequalis 263,267,332 
description 332 
distribution in Fairport (Iowa) fishponds 263 
relative importance of species 267 
donaciformis, Plagiola 446,463 
Dorosoma cepedianum 4,253 
dragonflies 243,247 
as food for mallards 247 
nymphs. 21,32,34,243 
Draparnaldiasp.. 401 
drum, banded 170,171,184,196 
big.. 
196 
black 196,197 
fresh-water 419 
gray 196 
puppy. 184,196 
red 184,197 
sea 196 
Dryopidse. 
ducks 
247 
mallard 247 
shoal-water, as beetle eaters 2i7 
wood 248 
duckweed 35,265,361 
Dunhevidia setigera 400,406 
duplex, Pediastrum 399, 401, 402, 404, 405, 410, 461 
duquesnei, Placopharynx 253 
Dytiscidae 232, 
233, 236, 238, 239, 241, 242, 247-249, 251, 253, 254, 257, 258, 
263, 264, 266-268, 270, 275-284. 
Dytiscus 249, 251, 252, 260, 262, 267, 282 
as fish eaters 251 
as food for dragonfly nymphs 243 
hybridus - 237,238,247,263 
distribution, according to size 238 
in Fairport (Iowa) fishponds 263 
migration 237 
turtles as enemies of adults 247 
interrogate 275 
ornaticollis 296 
ruficollis 274 
verticalis 263, 282-284 
adult, description and habits of 284 
distribution in Fairport (Iowa) fishponds 263 
eggs — - 282 
larva, description and habits of 282, 284 
pupa, description of. 284 
pupation - 284 
earthworms, as bait for catfish 2 
East Anchor Cove, salmon-tagging experiments at 43-45 
edentulus, Cnemidotus. 271 
Strophitus 218 
eels — - 4,419 
common. 4 
Elassoma evergladei. 5 
zonatum 5 
electric lights as enemies of beetles _ 248 
elegans, Eudorina 399, 401, 402, 404, 405 
ellipsis, Obovaria 446,462,463 
