354 



ANIMAL COMMUNITIES 



Correspondence of communities, 313-15. 



Cowbird, 274, 275, 290. 



Coyote, 15, 167, 286. 



Crane-fly: larvae, 190; adults, 191. 



Crappie, 115, 120, 126, 140. 



Crayfish: 69, 70, 199; behavior in 



drought, 90. 

 Crayfish, scientific names: 

 — Cambarus: 



blandingi acutus, 114, 116, 154. 



diogenes, 114, 121, 199, 204, 296. 



gracilis, 296. 



immunis, 144, 154. 



propinquus, 85, 90, 104, 114, 116, 



118, 121, 123. 



virilis, 85, 90, 105, 114, 116, 121, 



126, 135. 

 Creeks, sluggish, 102. 

 Cricket, striped shrub, 266. 

 Crickets, 167. 

 Crossbill, 229. 

 Crow, 242. 



Crustaceans or Crustacea: 67; as food, 

 20; pelagic, 76; deep-water, 80. See 

 Entomostraca, Crayfish, Sowbugs, Am- 

 phipods, Shrimps, and Mysis. 

 Current: water, 43, 61, 73, 86: about 

 stones, 61; intermittent, 90; swift, 

 94-99; reactions to, 29, 34, 91. 

 Cutworms, hibernating, 201. 



Dace: black-nosed, 91, 92, 106, in, 115; 



horned, 90, 91, 106, in, 115, 119, 120; 



red-bellied, 91, in, 115, 119. 

 Damsel-flies, scientific names: 

 — Argia, 121: 



putrida, 116. 

 — Calopteryx maculata, 99, 105, 116, 118. 

 —Enallagma, 117, 135, 155, 185. 

 — Ischnura verticalis, 104, 123, 132, 135, 



155- 

 — Lestes, 155. 



Damsel-fly nymphs, 99, 104, 105. 116, 

 117, 118, 121, 123, 130, 132, 135, 155, 

 185. 



Darter: 34, 97; banded, 95, 97, 119, 

 120; black-sided, 95, 97, 120; Johnny, 

 84, a 1 * 95, io 5> 115, 119. !20, 126, 135; 

 least, 84, 119; rainbow, 95, 97, 119, 

 120. 



Day and night, responses associated 

 with, 30. 



Deep-water communities of Lake Michi- 

 gan, 80. 



Deer, 14, 201, 238, 245, 269. 



Desmids, 76. 

 Diatoms, 76. 

 Dickcissel, 167, 283, 289. 

 Digger-wasps, habits of, 222, 231. 

 Dip-nets, illegal, 57. 

 Disagreement of communities, 307-8. 

 Dissolved foods of aquatic animals, 58. 

 Diurnal depth migration of Entomostraca 



and rotifers, 77. 

 Dogfish, 156. 



Dormancy: of eggs, 177-80; of winter 



bodies, 129. 

 Dragon-flies, adult, food habits, 227. 

 Dragon-flies, scientific names: 

 — Aeschna, 118: 



constricta, 90, 114. 

 — Aeschnidae, 104, 117. 

 — Anax, 142: 



jicnius, 132, 135, 155. 

 — Basiaeschna Janata, 121. 

 — Celithemis eponina, 155. 

 — Cordulegaster obliquus, 90, 114. 

 — Epiaeschna heros, 155. 

 — Gomphus: 



exilis, 99, 116, 121. 



spicatus, 143, 155. 

 — Leucorhinia, 142: 



intacta, 146, 147, 155. 

 — Libellula pulchella, 155. 

 —Libellulidae, 104. 

 — Macromia taeniolata, 103, 123. 

 — Pachydiplax longipennis, 155. 

 — Plathemis lydia, 116. 

 — Tetragoneuria cynosura, 114, 135. 

 — Tramea, 142: 



lacerata, 155. 

 — Sympetrum, 155: 



rubicundulum, 155. 

 Dragon-fly nymphs, 90, 93, 99, 103, 104, 

 116, 117, 118, 121, 123, 132, 135, 142, 

 143, 146, 147, 155. 

 Drift, animal, 219. 



Droughts: 90; behavior of stream 

 animals in, 92, 105; force animals 

 downstream, 106. 

 Duck, wood, 181, 190, 191. 

 Dunes, moving, 229. 



Earthworms, 20, 190, 262, 269. 

 Ecological agreement: of communities, 



305 ; of individuals, plants, and animals, 



304-8; of species, 315. 

 Ecological equivalence, 34. 

 Ecology: content of, 32, 299-318; 



genetic, 113, 137, 247-52, 308-15; 



