INDEX 



411 



Hydrogen sulphide, 100, 101, 297, 314 

 Hydioids, 54, 140, 332 

 Hjdiopsyche, 308, 310 

 Hydrosere, 13, 28, 91, 92, 94, 148, 232, 



249 

 Hyla, pickeringii, 231 



versicolor, 231 

 Hynienomycetcs, 140 

 Hymenoptera, 86, 114, 130, 135, 275 

 Hyphae, 140 

 Hypobiose, 18 

 Hypomosus pretiosus, 316 

 Hyraces, 119 



Icelinus borealis, 331 

 Ichthyococcus, 319 

 Ictalums, furcatus, 305 



punctatus, 300 

 Ictiobus, bubalus, 305 



urus, 305 

 Indicators, 351, 352 

 Infestations, 109 

 Influence, 237-238 

 Influents, 241-243, 12, 234, 355 

 major, 241 

 minor, 241 

 prairie, 257, 260 

 California prairie, 289, 290 

 desert plains, 283, 285 

 lake climaxes, 307 

 mixed prairie, 264-266 

 Palouse prairie, 293 

 true prairie, 273-275 

 Infusoria, 140, 141 



Insects, 62, 63. 117, 133, 134, 135, 138, 

 144, 167 

 adult, 183 

 blood-sucking, 159 

 carnivorous, 135, 136 

 coastal prairie, 280 

 cooperation in family, 152-154 

 cycles, 181-183, 197-199 

 diseases, 184 



fresh-water snbdominants, 300 

 grassland, 260 

 homes, 113, 114 

 larvae, 177 



migration, 62, 202-207 

 mixed prairie, 265-267 



Insects, pests, 108 



pollination, 142 



scale, 155 



swift-water communities, 308, 309 



true prairie, 274, 275 

 Instinct, 206 

 Interaction, 4, 68, 173 

 Interception, 92 



Interrelation of organisms, 103, 104 

 Invertebrates, 99, 322 

 Isopods, 333 



Jack pine, 232 



Jackrabbit, 125, 133, 257, 289 



antelope, 285 



long-eared, 252 



white-tailed, 264 

 Jaguar, 112 

 Jellyfishes, 315, 319 

 Joshua tree, 288 



Kaibab deer, 62, 185. 201 

 Kaibab squirrel, 124. 185 

 Kangaroo rat, 11, 73, 74, 80. 113, 122, 



283, 284, 285, 286, 290 

 Keratella, 301 

 Kestrel, 253 

 Killer whale, 316 

 Kingbirds, 135, 223 

 Kinglets, 134, 135 

 Kit fox, 285 

 Knysna, 12 



Koeleria, 243. 270. 287, 292 

 crista ta, 256, 270. 278, 287, 291 



Lacuna, 333 

 Lady beetle, 275 

 Lagopus, 197 

 Lake carp, 306 

 Lake climaxes, 305-307 

 Lake microcosm, 14 

 Lake sturgeon, 306 

 Landscape types, 20 

 Large-mouthed black bass, 301 

 Lark, 223 

 horned, 252. 253, 257 

 desert, 265 



