CONTENTS XI 



CHAPTER. PAGE. 



V. KEY TO THE ORDERS AND THE PRINCIPAL FAMILIES OF 



INSECTS, 



Definition. Hexapoda, '283. 



Orders, 283. Aptera. 284. Orthoptera, 285. Neu- 

 roptera, 280. Coleoptera, 287. Hymenoptera, 290.- 

 Hemiptera, 292. Lepidoptcra, 294. Diplera, 298. 



APPENDIX. 



INJURIOUS INSECTS, AND MODES OF DEALING WITH THEM. REFER- 

 ENCE BOOKS. 



Farm J'rurticcs. Culture, 301. Preventives, 302. Rotation of 

 Crops, 302. Insert icidcs, 303. For insects that Chew their 

 Food, 303. For insects with Sucking Mouth-parts, 304. In- 

 accessible Insects, 305. 



Injurious Insects, 308. Ants, 309. Aphids, Plant-lice, Green 

 Fly, 309. Insects Injurious to Apple, 309. Apricot, 312.- 

 Bean, 312. Blackberry. 313. Cabbage, 314. Cauliflower, 315. 

 Celery, 315. Cherry, 315. Corn, 316. Cucumber, 317. Cur- 

 rant, 318. Carpets. 319. Clover, 319. Elm, 320. Goose- 

 berry, 320. Grape. 320. House Plants. 322. Lettuce, 322.- 

 Maple, 323. Pea, 324. Peach, 324. Pear. 325. Plum, 320. 

 Potato, 326. Quince, 327. Raspberry, 327. Rose, 327.- 

 Squash. 328. Strawberry, 328. Sweet Potato, 329. Tomato, 

 329. Wheat, 330. 



Reference Books, 331. On Protective Devices, 331. On Social 

 and Solitary Insects. 331. On Flowers and Insects, 331. On 

 Our Friends and Foes, 331. On Wealth of Insect Life, 332. 



LIST OF ILLUSTRATIONS. 



Life History of the Black Swallowtail Butterfly, 



Frontispiece. 

 The Monarch and the Viceroy Plate II. 



PAGE. 



1. The Yellow Grasshopper (Mclanoplus different ialis) , 



female 



2. The Yellow Grasshopper I Mcl<inoi>liift differcntialis) , 



male 



