X CONTENTS 



CHAPTBR PAOB 



VIII. Family Life 2C» 



Pairing, 200. Recognition by sight and scent, 201. Stridu- 

 lation, 206. Courtship by feeding, 207. Egg-laying, 208. 

 Parental Care, 210. Nests and Families, 215. 



IX. Social Life 218 



Family Assemblies, 218. Social Beetles, 219. Family 

 Societies : Wasps, 222. Bees, 225. Inquilines, 232. Ants, 

 237: Fungus-growers and Drivers, 239; Honey-ants, 241; 

 Harvesters, 242 ; Slavers, 245. Guests, 248. Termites, 253. 

 Society and Individual, 260. 



X. Adaptations to Haunts and Seasons .... 262 

 Geographical Range, 263. Plabit and Body-form, 268. Pro- 

 tective resemblance, 272. Aquatic Insects, 273. Marine 

 Insects, 282. Seasonal Adaptation, 298. Migration, 304. 



XI. Classification 306 



Affinities and Relationship, 306. Wingless and Winged In- 

 sects, 307. Exopterygota and Endopterygota, 308. Summary 

 of Insect Orders, 309. Sub-orders and Families, 318. Genera 

 and Species, 321. 



XII. Evolution 325 



Natural Classification, 325. Descent with Modification, 326. 

 Course of Insect Evolution, 327. Modification of Jaws, 329 ; 

 of Wings, 330. Life-histories, 332. Fossil Insects and Geo- 

 logical History, 336. Insects and other Arthropoda, 346. 

 Factors of Evolution, 349. Heredity with Variation, 350. 

 Continuous and Discontinuous Variation, 351. Use-Inherit- 

 ance, 355. Germ-plasm Theory and Germ-track, 359. In- 

 fluence of Environment and Food, 361, Natural Selection, 

 365. Protective Resemblance, 369. Mimicry, 371. "Dar- 

 winism" and "Mendelism," 376. Isolation, 377. 



XIII. Insects and other Organisms 380 



Plants as Food for Insects, 380. "Food-chains," 381. Leaf- 

 eating Insects, 382. Wood-feeders, 384. Gall-makers, 385. 

 Inquilines, 387. Migrant Plant-feeders, 389. Effects on 

 Plants, 393. Insects and Flowers, 394. Insectivorous Plants, 

 395. Predaceous Enemies of Insects, 397. Insect Parasites 

 of Animals, 398. Internal Parasites of Insects : Worms, 408 ; 

 Protozoa, 409. Insects as alternate hosts, 412. External 

 Parasites, 415. Transport of small animals by Insects, 416. 



XIV. Insects and Mankind 418 



Pests and Allies of the Cultivator, 418. Cotton Insects, 419. 

 Predaceous Insects, 423. Messmates of Man, 424. Destroyers 

 of Buildings and Furniture, 427. Disease-carriers, 428. In- 

 sects in Ancient History, 439. Insects as Human Food, 440. 

 Domesticated Insects, 441. Services rendered by Insects, 445. 

 Insect and Human Societies, 446. Parable and Purpose, 447. 



REFERENCES 449 



INDEX 465 



