CONTENTS- Xix 



Page 

 Hive Bees — continued. 



Population of a hive - - - . . 434. 



Transportation of hives - - _ .' ^.^ 4 



Ventilation - - - - _ - 4;3(J 



Cleanliness ----__ 429 



• Language ------ 430 



Anger --..._ 43^ 



Wars ------ 432 



Enemies --____ 434 



Accidents ______ 43^ 



Temperature of the hive - - _ . 435 



Instincts not mere sensations - - - _ 437 



LETTER XXL 



Means by which Insects defend themselves - - - 439 455 



1. Passive. 



By imitating various substances, objects, and colors - - 439 



their brilliant colors - - _ . 443 



frightful aspect, horns, &c. - . _ _ 443 



spines, hairs, &c. - - - . > 443 



hardness and toughness - . _ _ 444 



involuntary offensive secretions - . _ 444 



power of vitality ----- 445 



extraordinary multiplication - - - - 445 



2. Active. 



By rolling themselves into a ball - . _ 447 



simulating death - - « . ^ 447 



assuming various attitudes - . _ . 448 



motions to alarm or escape their enemies - - - 450 



noises - « - - - 451 



disgusting and powerful scents - - - 451 



scent-organs ----- 453 



explosive discharges - _ - - 454 



emission of repulsive fluids - - - - 454 



their weapons of defence - - - - 457 



concealing themselves - - _ . 459 



feeding only by night _ - _ _ 453 



especial modes of defence - - - - 464 



LETTEfR XXIL 



Motions of Insects. 



Larva and Pupa - - _ _ . 4gg — 491 



1. Of Larva. 



Destitute of proper legs - •- - - 467 



Provided with proper legs - _ _ - 474 



Residing in water ----- 477 



2. Of PupcB ------ 478 



LETTER XXIII. 



Motions of Insects — continued. 



Imago ------ 481—518 



1. While in repose - - - - - 481 



