X LIST OF ILLUSTEATIONS. 



Scales on a Gnat's Wing 84 



Bkistle-tail 85 



Scale of Bristle-tail 86 



Battledoor-scale of Polyommatds Alexis 89 



Fringed Scale of Pieris 91 



Scales of Diamond-Beetle 93 



Air-pipe of Fly 109 



Spiracle of Fly 112 



Spiracle of Leather-coat 114 



Spiracle of Cockchafer-grub 114 



Grub of Chameleon Fly 117 



Foot of Fly 132 



Foot of Water-Beetue .'. 134 



Sting of Bee 144 



Gall-Fly, and Mechanism of Ovipositor 146 



Outer Saw of Saw-Fly 153 



Inner Saw of Saw-Fly 154 



Mouth of Beetle 162 



Maxilla and Lower Lip of Bee 164 



Lancets of Female Gnat 173 



Tongue of Blow-Fly 175 



Sucker of Butterfly 180 



Amtenna of Cockchafer 187 



Portion OF Antenna of Oak Egger Moth 190 



Ear of Crab 199 



Daphnia 207 



Cypris 209 



ZoEA OF Shore-Crab 212 



Second Stage of Shore-Crab 214 



Third Stage of Shore-Crab 216 



Adult Shore-Crab 217 



Hand of Barnacle 224 



Young of Barnacle 228 



Fang of Spider 238 



Eyes of Spider 239 



Claws of Spider 250 



Head of Cheese-Mite 255 



Brachionus 267 



Mouth of BKAcmoNus , 270 



Whiptail 275 



Skeleton Wheel-Bearer 279 



