IV CONTENTS. 



Page 



Ovipositor of an ichneumon (Pimpla), 56 



Experiments of Reaumur, 57 



Common mistakes of Naturalists, 5& 



Parasite of tlie cabbage caterpillar (Pontia), 61 



Egff parasites, 63 



Parasites of the aphides, 65 



Singular parasite of the cock-roach, 66 



Rare parasites of bees and wasps, 67 



Tact of insects in discovering food for their young, 68 



Sometimes select exotic plants, 6&' 



Instanced in a leaf-miner (Tephrilis?), 70 



Solitary and gregarious caterpillars, 71- 



Life-boat of eggs constructed by the gnat, 72 



Experiments upon it, 75 



Infallibility of instinct questioned, 76- 



Mistakes of instinct, 77 



CHAPTER IV. 



Hybernation of insects" eggs, 79 

 Proceedings of the gypsey moth compared to the eider 



duck, ib. 



Singular groups of eggs, 81 



Protection of eggs from heat, 83 



Anal tweezers of moths, 84 



Eggs in spiral groups, 85 



Arched form of the lackey moth's eggs, 86 



Hybernation of the eggs of aphides, 87 



Singular protection of the eggs of cocci., 88 



Coccus of the hawthorn, 90 



Shell-formed coccus of the currant, 92 



Hybernation of spiders' eggs, 93 



Curious spider's nests, 94 



Eggs of the vapourer moth on its cocoon, 95 



Effects of cold on insects' eggs, 96 



Observations of John Hunter, 98 



Insects not killed by severe frosts, ib. 



CHAPTER V. 



Hatching of insect eggs, I'Oa 



Structure of the eggs of birds, ib,- 



Insects do not hatch their eggs, 101 



Anomalous instance of the earwig, 102- 



Earwigs cannot get into the brain, 103- 



Partial hatching by spiders, 104- 

 Exporimci^v upon the wolf spider by Svvammerdain 



and Bonnet, 105 



Eggs hatched before they are laid, 108 



Ovo-viviparous insects, 109 



Coil of larvae in the body of a blow-fly, IIQ 

 Aphides sometimes produce eggs, sometimes young, 112 



