INDEX 



449 



Shrike, Loggerhead, 235, 236. 



Skipper butterfly, 33. 



Slender bodied locust (Leptysma 

 marginicollis), 420. 



Slender meadow, or Striped green 

 grasshopper (Xiphidium fascia- 

 turn), 326, 328, 332, 336, 388, 390, 

 394, 427. 



Slope, definition of, 433. 



Slough, definition of, 431. 



Slug (Phyloviyus caroliensis), 288, 

 289. 



Slug-like snail (Agriolimax campes- 

 tres), 289. 



Small brown cricket (Anaxipha exi- 

 gua), 421. 



Small earwig (Labia minor), 425. 



Small ground cricket (Nemobius exi- 

 guus), 423. 



Small Indiana grasshopper (Orche- 

 limum indianense), 428. 



Small locust (Melanoplus minor), 

 422. 



Small sulphur butterfly, 56. 



Smith, on orange-tip butterfly, 85. 



Snail, slug-like, see Slug-like snail. 



" Snake doctor " (Anax), 278, 281, 

 283. 



Snakes, and birds, 229-231; Blow, 

 pufl'-adder or hog-nose (Eeterodon 

 platyrhinus), 298-300; Blue racer, 

 229, 230; Garter, harmlessness 

 of, 231. 



Snout butterfly (Libythea hacTc- 

 manni), 64. 



Snow, definition of, 433. 



Snowy shrub cricket (Oecanthus 

 niveus), 428. 



Sociable field cricket (GryJlus abbre- 

 viatus), 326, 387, 423. 



Sound, of blow-snake like cicada, 

 299; of tree-toad, 73. 



Sounds of insects, see Stridulation. 



Sparrow, field, 265-267, 310; nest of, 

 243, 244, 266, 310. 



Species, definition and theory of, 4- 

 6, 18; formation of, 13-17; dis- 

 persal of, 317, 318; geodytes, 

 419-426; genotypes, 19; modifica- 

 tion of, 3; phaenotypes, 19; sta- 

 bility of, 11; phytodytes, 426- 

 429; variations of, 17-19. 



Spencer, definition of ' ' survival of 

 the fittest, " 8 ; theory of origin 

 of intelligence, 11. 



Sphex wasp, 199 (Sphex ichneu- 

 monea), 167, 195-201. 



Sphinx moth, example of warning 

 color, 156-159; Achemon, cater- 

 pillar, 156-159; Celerio lineata, 

 night flying, 306. 



Spicated grouse locust (Tettigidea 

 spicata), 420. 



Spiders, food of wasp, 210-214; 

 Argiope in dunes, 297; Castle- 

 building (Lycosa domifex or Ly- 

 cosa fatifer), 186-192; Crab (Mis- 

 umena vatia), 170, 172, 173, 183- 

 186; Jumping (Phidlppus morsi- 

 tans), 192-194; Lyeosidae, 277. 



Spines of painted lady larva, 140, 

 142. 



Spirogyra, food for minnows, 284. 



Spots, eye-like, of Click beetle, 301 ; 

 lo moth, 161, 162; Polyphemus 

 moth, 62; Sphinx moth, 158; 

 Swallow-tail, 146, 148, 149. 



Spotted camel cricket (Ceuthrophi- 

 lus maculatus), 424. 



Spotted coUops beetle, 274, 275. 



Spotted ground cricket (Nemobius 

 macnilatus), 425. 



Spotted locust (Orphuella pelidna), 

 420. 



Sprengel on adaptation, 43, 44. 



Spring, definition of, 430. 



Sprinkled locust (Chloealtis con- 

 spersa), 297, 326, 327, 330, 344, 

 347-351, 424. 



Spurge, in dunes, 296. 



Squirrel, red, 236, 239, 309. 



Stability, specific, due to inherit- 

 ance, 10. 



Stag beetle (Lucanus dama), 301, 

 302. 



Stagnant water, definition of, 430. 



Steeple bush, 296. 



Stenoma moth, example of protect- 

 ive resemblance, 94-98. 



Sterile, definition of, 433. 



Sterile regions, life of, 322-324. 



Straight lanced, or Dorsal striped 

 grasshopper, (Xiphidium stric- 

 turn), 326, 427. 



Strand, definition of, 432. 



Stream, definition of, 430. 



Stridulation of Arboreal katydid, ' 

 102-104; Carolina locust, 342; 

 Clouded locust, 374; Cone-head 

 grasshopper, 337. 340, 388, 392; 

 Forked-tailed katydid, 334; Mole 

 cricket, 376-378, 390; oblong 

 wing katydid, 334; Pennsylvania 

 field cricket, 386, 387; Short- 



