INDEX 



449 



Shrike, Loggerhead, 235, 236. 



Skipper butterfly, 33. 



Slender bodied locust (Leptysma 

 •marginicollis), 420. 



Slender meadow, or Striped green 

 grasshopper (Xiphidium fascia- 

 turn), 826, 328, 332, 336, 388, 390, 

 394, 427. 



Slope, definition of, 433. 



Slough, definition of, 431. 



Slug (Phylomyus caroUensis), 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, 

 puff-adder or hog-nose (Heterodon 

 platyrhinus), 298-300; Blue racer, 

 229, 230; Garter, harmlessness 

 of, 231. 



Snout butterfly (LibytJiea bacTc- 

 manni), 64. 



Snow, definition of, 433. 



Snowy shrub cricket (Oecanthus 

 niveus), 428. 



Sociable field cricket (Gryllus ahbre- 

 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; phsenotypes, 19; sta- 

 bility of, 11; phytodytes, 426- 

 429; variations of, 17-19. 



Spencer, definition of " survival of 

 tie fittest," 8; theory of origin 

 of intelligence, 11. 



Sphex wasp, 199 (Sphex ichneu- 

 monea), 167, 195-201. I 



Sphinx moth, example of warning 

 color, 156-159; Achemon, cater- 

 pillar, 156-159; Celerio Uneata, 

 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- 

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

 umena vatia), 170, 372, 173, 183- 

 186; Jumping (PMdippus morsi- 

 tans), 192-194; Lycosidae, 277. 



Spines of painted lady larva, 140, 

 142. 



Spirogyra, food for minnows, 284. 



Spots, eye-Jike, of Click beetle, 801 ; 

 lo moth, 161, 162; Polyphemus 

 moth, 62; Sphinx moth, 158; 

 Swallow-tail, 146, 148, 149. 



Spotted camel cricket (Ceuthrophi- 

 lus maculatus), 424. 



Spotted collops beetle, 274, 275. 



Spotted ground cricket (Nemobius 

 maculatus), 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 (Luoanus 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 stria- 

 tum), 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, 892; 

 Forked-tailed katydid, 334; Mole 

 cricket, 376-378, 390; oblong 

 wing katydid, 334; Pennsylvania 

 field cricket, 386, 387; Short- 



