Vlll CONTENTS 



CHAPTER. PAGE. 



VII. THE MUTUAL RELATIONS OF PLANTS AND INSECTS, . . 94 



Plants whose flowers are sterile to their own pollen 

 but fertile to pollen brought from other plants of 

 same species, 96. Plants whose flowers are so con- 

 structed as to prevent self -fertilization, 104. The 

 Yucca Lily and the Pronuba Moth, 112. 



VIII. OUR FRIENDS AND FOES, 119 



Of the Fruit Grower. Tent Caterpillar, 123. Can- 

 ker Worm, 124. The Codling Moth, 125. The Honey- 

 Bee, 131. Wasps, 132. Parasitic Insects, 132 Pre- 

 daceous Insects, 133. 



Of tlie Farmer, 134. The Chinch-bug, 135. Grass- 

 hoppers, 137. The Army Worm, 141. The Potato 

 Beetle, 142. Squash-bug, 143. The Cabbage-worm, 

 144. Some Beneficial Insects, 145. 



Of the Housekeeper, 147. The House-fly, 147. The 

 Buffalo Moth, 148. The Clothes Moth, 150. The Cock- 

 roach, 152. House Ants, 153. 



Of Man in General, 154. The Mosquito, 154. Bene- 

 ficial Insects, 158. 



IX. THE WEALTH OF INSECT LIFE ORDERS, 102 



APTERA, 165. The Fish Moth, 166. The Spring- 

 tail, 160. 



NEUROPTERA, 107. May-flies, 167. Stone-flies, 168. 

 -The White Ants, 169. Dragon-flies, 172. Caddis- 

 flies, 176. 



ORTHOPTERA, 176. 



Orthoptera that Walk, 178. Cockroaches, 178. 

 Praying Mantis, 178. Walking-sticks, 180. 



Orthoptera that Jump, 180. Crickets, 180. Katy- 

 dids, 181. Grasshoppers, 182. 



TllYSANOPTERA, 182. 



HEMIPTERA, 183. The Heteroptera, 184. The Ho- 

 moptera, 185. 



COLEOPTERA, 190. 



LEPIDOPTERA, 191. Moths, 193. Skippers, 193. 

 Butterflies, 194. 

 DIPTERA, 196. Fleas, 197. 



