CONTENTS. V 



Page 



Care taken of these eggs by ants, 1 13 



Cocco-viviparous flies (^Hippoboscid(z)^ 116 

 Effects of heat upon eggs, ^ 118 



Management of silk-worms' eggs, 120 



Effects of light on eggs, ib. 



Some insect eggs increase in size, 121 



Growth of the eggs of ants, 122 



Developement of the eggs of spiders, 123 



Spiders live long without food, 124 



Insects probably gnaw through their egg-shells, 125 



Valves of insect eggs, 126 



Period of hatching influenced by temperature, 127 

 SECTION II.— LARViE. 

 CHAPTER VI. 



Structure of caterpillars, grubs, and maggots, 128 

 Meanings of these tercns. Note, ib. 



Supposed transmutation of plants into animals, 129 



Observations of Unger upon this, 130 



Remarks of Bory St Vincent, 131 



Supposed formative power of the blood, 132 



Embryo butterfly in the caterpillar, l3o 



Experiments to show this, 134 



Dissections of the buds of plants, 136 



Difference of plants from insects, 137 



Internal structure of caterpillars, 138 



Breathing-tubes and formation of their blood, 139 

 Colours of caterpillars not intended for concealment, 140 



Imitative forms of caterpillars, 142 



Walking-leaf insect, 144 



Caterpillars in form of branches, 146 



Conspicuously coloured caterpillars, 147 



Butterflies supposed to be coloured like flowers, 149 



Singular forms of caterpillars, 151 



Forms of water-grubs, 1.^4 



Breathing organs in water larvae, 166 



Water worms (J^ais) may be mistaken for larvae, 159 



Syringe for respiration in a water larva, 161 



Curious mask of the same larva, 163 



Dust mask of the wolf bug (Reduvius)^ 165 



CHAPTER VII. 



Growth, moulting, strength, defence, and hybernation of 



larvse, 166 



Progressive increase of the silk-worm, 167 



Compared with the growth of buds, 168 



Process of moulting or casting the skin, 169 



Accidents interrupt this process, 170 



Reds, a disorder similar to renal gravel, 172 



Position of the hairs in moulting, 173 

 VOL. VI. B 



