xviii CONTENTS. 



Page 

 Ants — continued. 



Formic acid - - - - - 360 



Wars - - - - " - - 361 



Slave-making _-.»-- 3^4 



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 XYIII. 

 Peufect 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 



Hive Bee " . " . " ' " " 391—414 



Individuals composing the society . - _ 392 



Education of a new Queen _ - - - 395 



Larvae and pupae .--.-- 400 



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 - - - " " 406 



Fecundation of the Queen - - - - 408 



Oviposition by the Queen . - - - 410 

 Swarming - - - - - -410 



LETTER XX. 



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



Hive Bee - - - - - - 415—436 



Drones ' - ... - 415 



Workers - - - - - - 417 



collecting nectar - - •* - 418 



pollen - - - - 420 



propolis i _ * - 422 



Distance of excursions ----- 423 



Scouts .-...- 423 



