xxvi CONTENTS. 



Page 

 Hive Bee continued. 



Cleanliness - 

 Language - 

 Anger ------- 



Wa?s 397 



Enemies - - 



Accidents - 



Temperature of the hive 



Instincts not mere sensations ----- 402 



LETTER XXI. 



MEANS BY WHICH INSECTS DEFEND THEMSELVES - 404430 



1. Passive. 



By imitating various substances, objects, and colours 404 



their brilliant colours 

 frightful aspect, horns, &c. 

 spines, hairs, &c. . 



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 - - 



assuming various attitudes - - - - -413 



motions to alarm or escape their enemies 



noises - - 



disgusting and powerful scents - - - 416 



scent-organs - - - - - - -416 



explosive discharges - 



emission of repulsive fluids - - - - -419 



their weapons of defence ----- 422 



concealing themselves - - 



feeding only by night ... - 428 



especial modes of defence .... - 428 



LETTER XXII. 



MOTIONS OP INSECTS. 



Larva and Pupa ------ 431 446 



1. Of Larvas. 



Destitute of proper legs - - 432 



Provided with proper legs ' - - - - 438 



Residing in water - - - - - -442 



2. Of Pupa - - - . " - - - 443 



