xxvi CONTENTS. 



Page 

 JJive Bee continued. 



Cleanliness - ..... 394 



Language - . 394 



Anger - - - - - 395 



Wars - ..... 397 



Enemies - . "jj 399 



Accidents - . " 400 



Temperature of the hive - . t- .^ -401 



Instincts not mere sensations 402 



LETTER XXI. 

 MEANS BY WHICH INSECTS DEFEND THEMSELVES 404 430 



1. Passive. 



By imitating various substances, objects, and colours - 404 



their brilliant colours - . - 5 - 407 



frightful aspect, horns, &c. - . . - 407 



spines, hairs, &c. - - . ^L^ - - 408 



hardness and toughness - - - . 409 



involuntary offensive secretions ..... 409 

 power of vitality --... 409 



extraordinary multiplication - . . . - 411 



2. Active. 



By rolling themselves into a ball - . . . -411 



simulating death - . . . . -412 



assuming various attitudes - . . . - 413 



motions to alarm or escape their enemies - - 415 



noises - ..... 415 



disgusting and powerful scents . . . - 416 



scent-organs - - . . . . -416 



explosive discharges * . . . -418 



emission of repulsive fluids ' . . -419 



their weapons of defence - .... 422 



concealing themselves ... . . . 454 



feeding only by night - . . -$ . - 428 



especial modes of defence . 428 



LETTER XXII. 

 MOTIONS or INSECTS. 



Larva and Pupa - . - - . 431 446 



1. Of Larva. 



Destitute of proper legs ...... 432 



Provided with proper legs ..... 438 



Residing in water - . .. -442 



2. Of Pupa - . - . . - 443 



