INDEX. 



205 



Exoskeleton, 33, 114 

 Eye, compound, 19. 



Facets of compound eye, 19. 

 Feathers, 110. 

 Fish, 79, 173. 

 Fission, 165. 

 Fly, 43. 



Food of grasshopper, 34. 

 Formalin, 173, 174, 175. 

 Formic acid, 50. 

 Fresh-water clam, 135, 175. 

 Fresh-water sponge, 157, 175. 

 Frog, 91. 173. 

 Fur beetles, 38. 



Gall gnats, 45. 

 Ganoidei, 86. 

 Garpike, 85. 

 Gasteropods, 144. 

 Geese, 117 

 Gemmule, 157, 159. 

 Genera, 36. 

 Geologic series, 103. 

 Germinal disc, 116. 

 Giant water bug, 38, 171. 

 Gill breathing, 73. 

 Gill scoop, 74. 

 Gizzard of cricket, 38. 

 Gizzard of pigeon, 107. 

 Glossary, 190, 194, 199, 303. 

 Gnat, 45. 

 Gordius, 149. 

 Grasshopper, 13, 170. 

 Gryllidse, 38; Gryllus abbrevi- 

 atus, 38 ; Gryllus luotuosus, 38. 

 Gypsy moth, 37, 131. 



Habits of earthworm, 148. 

 Hair worm, 35. 

 Harpalus, 171. 



Harvest fly, 40. 



Heart, single, 87 • respiratory, 87. 



Hemiptera, 40. 



Hermaphroditism, 147. 



Hessian fly, 45. 



Heterocercal tail, 86. 



Heteromyenia argyrosperma, 159. 



Heteroptera, 41. 



Hind wing of wasp, 49. 



Hinge ligament, 140. 



Homocercal tail, 86. 



Homology, 35, 66, 114. 



Homoptera, 41. 



Honey, 50. 



Hoppers, tree, 41. 



Hornet, 48, 173. 



House fly, 43, 172. 



Hydra, 155, 175. 



Hydrachna belostomse, 39. 



Hydianth, 156. 



Hydroids, 156. 



Hymenoptera, 50. 



Icerya purchasi, 133. 



Imago, 34, 36. 



Immortality of Protozoa, 165 



Improper questions, 10. 



Incisors, 130. 



Incomplete or direct metamor- 

 phosis, 23. 



Incubation, 116. 



Indirect or complete metamor- 

 phosis, 35. 



Individual, 156. 



Injury done by grasshoppers, 24 ; 

 by moths, 37; by insects, 59; 

 by rabbits, 130. 



Insecta, 13-60. 



Insect net, 59. 



Insects, orders of, 54, 183. 



Instruments, 11, 176. 



