INDEX 



323 



Globigerina-ooze, 18. 



Globigerinae, 16. 



Gonium, 25-30. 



Gonium pectorale (illus.), 25. 



Grasshopper, auditory organ of 



(illus.), 234. 



Green-leaf insect (illus.), 210. 

 Gregarina, 13, 182. 

 Gregarina polymorpha (illus.), 14. 

 Gregarinidas, 14. 

 Gregariousness, 163. 

 Growth, 78. 

 Gryllotalpa (illus.), 146. 



Habit, 251. 



Habitat, relation of species of, 283. 



Habits, domestic, 257. 



Habits, nest-making, of birds, 264 ; 

 of fishes, 264 ; of insects, 262 ; of 

 invertebrates, 258; of spiders, 

 259 ; of vertebrates, 264. 



Hearing, sense of, 232. 



Heliosphc&ra actinota (illus.), 19. 



Heredity, 89. 



Hermaphroditism, 60. 



Hermit-crab, with the sea-anemone 

 (illus.), 176. 



Hibernation, 103. 



Hiving honey-bees (illus.), 154. 



Holothurian, alimentary canal of 

 (illus.), 70. 



Homes, 257. 



Honey-bee (illus.), 150; adult and 

 larva (illus.), 83; leg of (illus.), 

 151 : life history of, 149. 



Honey-bees, hiving a swarm of 

 (illus.), 154. 



Host, relation of parasite to, 179. 



Human degeneration, 200. 



Humming-bird, nest of rufus 

 (illus.), 265, 266. 



Hydra, 37. 



Hydra vulgans (illus.), 38. 

 Hydrophilus (illus.), 146. 

 Hyla regilla (illus.), 145. 



Icerya and Vedalia, 121. 



Icerya purchasi (illus.), 142. 



Ileum, 68. 



Individual, 31. 



Indo- African realm, 301. 



Inorganic matter, 112. 



Insect galls on leaf (illus.), 144. 



Insects, metamorphosis of, 90; nest- 

 making habits of, 262 ; parasitic, 

 188. 



Instinct, 242. 



Instincts, altruistic, 243 ; classifi- 

 cation of, 243 ; concerned with 

 care of the young, 250 ; egoistic, 

 243; of climate, 248; of court- 

 ship, 248 ; of environment, 248 ; 

 of feeding, 244 ; of play, 247 ; of 

 reproduction, 249; of self-de- 

 fense, 245 ; variability of, 251. 



Intellect, 254. 



Intestine, 68. 



Invertebrates, nest-making habits 

 of, 258. 



Irritability, 8, 240. 



Island, coral (illus.), 44. 



Itch-mite (illus.), 192. 



Jack-rabbits, showing variation 



(illus.), 281. 



Jay, Canada (illus.), 138. 

 Jejunum, 68. 



Jelly-fish, eye of (illus.), 238. 

 Jelly-fishes, 37 ; colonial, 45. 



Kallima (illus.), 211. 

 Kangaroo (illus.), 139. 

 Katydid, egg of (illus.), 79. 

 Lady-bird beetles (illus.), 214. 



