INDEX. 



3^3 



Searcher, the, 70 

 Secondaries, 270 

 Sharp-shinned hawk, 291 

 Shield-backed bugs, 113 

 Shield-backed grasshoppers, 90 

 Shrimps, 238 

 Shore birds, 327 

 Silkworm moth, 133 

 Simple body type, s, 28 

 Siphonaptera, 226 



characteristics, 226 



development, 227 



parasitism, 226 



relation to bubonic plague, 

 229 

 Skeleton of insects, 5 

 Skunk, 260 

 Smell, sense of: 



birds, 298 



insects, 11, 299 

 Smelling organs: 



birds, 299 



insects, 12 

 Snails, 290, 329, 331 

 Snake flies, 221 

 Snakes, value of, 68 

 Snipes, 327 

 Soldier beetle, 6g 

 Soldier bug, 117 

 Soldier fly, 188, 203 

 Solpugida, 235 

 Song sparrow, 271 

 Sparrow, English, 74, 137, 290, 



310 

 Sparrow hawk, 97, 256, 291 

 Sparrows, 74, 97, 118, 137, 256, 



290 

 Special senses, 7, 296 

 Species, 272 

 Sphecina, 168, 171 

 Sphinx moth, 133 

 Spiders, 2, 238 



characteristics, 238 



development, 244 



food habits, 240 



mouth-parts, 239 



non-sociability, 240 



poison glands, 239 



respiration, 239 



sense of, 240, 242 



spinning habit, 242 



spinning organs, 244 

 Spider wasps, 168 

 Spiracular system of insects, 2 1 



Squash bug, 41, loi, 118 

 bird enemies, 61 



Stable flies, 189 



Steganopodes, 343 



Sticklebacks, 200 



Stink bugs, 117 



Stone flies, 217 



Storks, 331 



Stridulation, 89 



Struggle for existence, 132 



Sunfish, 200 



Swallow, barn, 97, 256 



Swallow-tail, black, 135 



Swan, 337, 339 



Swarming of bees, 160 



Sympathetic system: 

 birds, 297 

 insects, 29 



Tachina flies, 201 

 Tail of bird, 267 

 Tarantula killer, 170 

 Taste: 



birds, 300 



insects, 16 

 Tent caterpillars, 134, 137 

 Termites, 44 

 Terns, 347 

 Thalessa, big, 150 

 Thorax, 2 



Thread-legged bug, 113 

 Tread- waisted wasp, 168 

 Thrips, 44 

 Thysanura, 44 

 Ticks, 2, 234 

 Tiger beetle larva, 60 

 Toads, 259 

 Tobacco worm: 



adult, 37 



egg, 34 



larva, 35, 133 



pupa, 36 

 Touch: 



birds, 300 



insects, 13 



man, 14, 15 

 Towhee, 74, 97, 290 

 Trap-door spider, 241 

 Tree cricket, 80 

 Tree duck, 341 

 Trichoptera, 44 

 Tumble bugs, 60" 

 Turkey, wild, 326 



