366 



INDEX AND GLOSSARY 



Seventeen-year cicada, 92, 298. 

 locust, 92, 298. 



Shad, 191, 334. 



Shade trees, insects enemies of, 

 23, 79, 83. 



Sharks, 187-189. 



Sharp-shinned hawk, 251, 254. 



Sheep tick, 51. 



Shellfish, 142-147. 



Ship worm, 144. 



Shrew, 274, 275. 



Shrimp, 141, 300. 



Silk worm culture, 23. 



Silk worms, 75-78. 



Silver-fish, 24. 



Silver-spotted fritillary, 70. 



Siren, 204. 



Siren'ia, 28, 264. 



Skate, 189. 



Skeleton of cat, 290. 

 horse, 266. 



Skinks, 212. 



Slipper animalcules, 178. 



Sloths, 264. 



Slug, 148. 

 rose, 59. 

 pear, 59. 



Smell, 306, 307. 



Snail, 147, 148. 



Snake embryo, 303. 



Snakes, 213-221. 



Snapping turtle, 223. 



Snout beetles, 107. 



Snowy owl, 321. 



So'mites (Gr. soma, body), 33. 



Song sparrow, 239, 240. 



Sow bug, 140. 



Sparrow hawk, 251, 255. 



Sparrows, 236-240. 



Species, 28. 



Sperm, the male cell which, unit- 

 ing with the egg, fertilizes it, 

 thus rendering it capable of 

 developing into a new ani- 

 mal, 170, 172. 



Spermatozo'a, plural of sperma- 

 tozoon. 



Spermatozoon, same as sperm. 



Sphinx moths, 73. 



Spider crab, 316. 



Spiders, 125-130. 



Spinnerets of spiders, 129. 



Spinning moths, 74. 



Spiny ant eater, 263. 



Splint bone, 266, 353. 



Sponges, 175-177. 



Spontaneous generation, the de- 

 velopment of a living body 

 from dead material, 342-344, 



Spores, 182, 343. 



Sporozd'a, 182. 



Spring peeper, 206. 



Spruce beetles, 109. 



Squalis, 187. 



Squamata, 211. 



Squash bug, 24, 105. 



Squid, 149. 



Squirrels, 270. 



Stable fly, 46. 



Stag beetle, 111. 



Starfish, 161, 165. 



Stegomy'ia, 41. 



Sternum, 33. 



Stinging insects, 51-56. 



Strawberry weevil, 24, 109. 



Strongylus, 325. 



Struggle for existence, 334. 



Subkingdoms, 25-28. 



Suckers, 190. 



Sunfishes, 193. 



Survival of the fittest, 334. 



Swallows, 240. 



Swallowtails, 71. 



Swifts, 244, 249, 250. 



Symbio'sis, 323. 



Syrphus flies, 48. 



Tach'ina flies, 47, 332. 

 Tadpole, 207, 208, 301, 302. 

 Taenia, 158, 327. 



