xviii CONTENTS. 



Page 

 Ants — continued. • 



Formic acid _ . . - - 360 



Wars ------ 361 



Slave-making _ . - - - 3(54 



Milch Cattle — Aphides, &c. . - - - 370 



Emigrations .... - 373 



Working all night ----- 377 



Roads and track-ways . - - - 378 



Strength and perseverance - - - - 380 



Bridge-making ----- 380 



Repose and sleep ----- 381 



Sports and games _ - - - - 381 



LETTER XVIII. 

 Perfect Societies of Insects — continued . . . 383 — 390 



Wasps. — Humble Bees ----- 383 — 390 



Wasps. 



Individuals composing the society . - - 383 



Labors of workers _ - - • - 385 



Storing up honey ----- 385 



Sentinels ------ 385 



Humble Bees. 



Individuals composing the society _ - - 386 



Employment of females _ _ - . 386 



Small females _ - . - - 388 



Parasitic Humble Bees . _ - - 389 



Temper and disposition _ - _ - 389 



LETTER XIX. 



Perfect Societies of Insects — continued - . _ 391 — 414 

 ITiveBee ------ 391—414 



Individuals composing the society - - - 392 



Education of a new Ciueen - - " " 395 



Larva; and pupae - - - " " '100 



Queen Bee ... - - 401 



Combats of Queens ----- 402 



First swarm conducted by the old Queen _ - - 403 



Treatment of young Queens - - - - 404 



Devotion to the Queen - - " " 406 



Loss of a Queen - - - " " 400 



Fecundation of the Queen - - - ■ 408 



Oviposilion by the Queen - - - " 410 



Swarming - - - - - -410 



LETTER XX. 



Perfect Societies of Insects — concluded - - - 415 — 436 



Hive Bee - - - - - . - 415—436 



Drones - - - - - -415 



Workers - - - - - - 417 



cpllecting nectar . _ - - 418 



pollen - - - - 420 



propolis . - - - 422 



Distance of excursions ----- 423 



Scouts .-.--- 423 



