INDEX. 



207 



Porte lumiere, 178. 

 Praying mantis, 31. 

 Pressure upon subsistence, 133. 

 Proboscis of fly, 42. 

 Productions of insects, 59. 

 Proper questions, 10. 

 Protective coloration, 25, 29, 36. 

 Protective resemblance, 30. 

 Protoplasm, 163. 

 Protozoa, 103, 160, 165. 

 Punctorial bristle, 38. 

 Pupa, 34. 



Queen bees, 50. 



Rabbit, 131, 130. 



Radiates, 152, 164. 



Radula, 144. 



Rats, 130. 



Reproduction by fission (proto- 

 zoa), 165. 



Reproduction of parts, 153, 156. 



Reptiles, orders of, 130. 



Review topics, 31, 56, 75, 89, 98, 

 111, 136, 153, 168. 



Rodentia, 130. 



Rudimentary organs, 36. 



Rules for naming, 26. 



Salamander, 100. 



Samia cecropia, 36. 



San Jose scale, 181. 



Sauropsida, 119. 



Scales from wing of butterfly, 35. 



Scolopendra, 66. 



Scolopocryptops, 65. 



Segmentation of the egg, 116. 



Selaohii, 85. 



Senses of insects, 34. 



Setting board, 60, 177. 



Seventeen year cicada, 40. 



Sharks, 85. 



Shellac, 59. 



Silk, 36. 



Silky locust mite, 34. 



Skeleton, 23. 



Slipper animalcule, 163. 



Slug, 144, 175. 



Snail, 143, 175. 



Snake doctor, 46. 



Social organization, 50 



Solitary wasps, 53. 



Sow bug, 71, 173. 



Species, 86. 



Species of insects — number of, 59. 



Spicules, 158. 



Spider, 61, 173. 



Spider webs, 63. 



Spinnerets, 63. 



Spiracles, 15, 30, 38. 



Sponge, 157. 



Spongiolin, 157. 



Squash bug, 39, 171, 



Squirrels, 130. 



Stages of development, 34, 100. 



Starfish, 140, 150, 175. 



Stentor, 163, 175. 



Sting, 49. 



Struggle for existence, 133. 



Sturgeon, 85. 



Survival of the fittest, 133. 



Symphoricarpus, 63. 



Synopsis of chapters, 7. 



Tables for determining the fam- 

 ilies of insects, 185-303. 



Table of addition of organs, 167. 



Tables of differences, 30, 34, 55, 

 65, 77, 96, 98, 111, 138, 129, 141, 

 143, 150. 



Tables of resemblances, 31, 55, 

 77, 118, 139, 141, 143, 164, 166. 



