X LIST OF ILLUSTRATIONS. 



PAGE 



Bristle-tail .... 7G 



Scale op Bristle-tail 77 



Battledore-scale of Polyommatus Alexis .... 80 



Fringed Scale of Pieris 81 



Scales of Diamond-Beetle . . .... 83 



Air-pipe of Fly 95 



Spiracle of Fly 98 



Spiracle of Leather-coat 99 



Spiracle of Cockchafer- grub 100 



Grub of Chameleon Fly 102 



Foot of Fly 116 



Foot of Water-Beetle 118 



Sting of Bee 127 



Gall-Fly, and Mechanism of Ovipositor .... 128 



Outer Saw of Saw-Fly 133 



Inner Saw of Saw-Fly 134 



Mouth of Beetle 140 



Jaws of Bee 142 



Lancets of Female Gnat 150 



Tongue of Blow-Fly 151 



Sucker of Butterfly 150 



Antenna of Cockchafer 162 



Antenna of Oak Egger Moth 104 



Ear of Crab 172 



Daphnia 179 



Cypris 181 



Zoea of Shore-Crab 183 



Second Stage of Shore-Crab 185 



Third Stage of Shore-Crab 187 



Adult Shore-Crab 188 



Hand of Barnacle .193 



Young of Barnacle 197 



Fang of Spider 206 



Eyes of Spider 207 



Claws of Spider 217 



Head of Cheese-Mite 221 



Brachionus 232 



Mouth of Brachionus 235 



