X LIST OF ILLUSTRATIONS. 



PAGE 



BRISTLE-TAIL 76 



SCALE OP BRISTLE-TAIL 77 



BATTLEDORE-SCALE OP POLYOMMATUS ALEXIS .... 80 



FRINGED SCALE OP PIERIS 81 



SCALES OP DIAMOND-BEETLE 83 



AIR-PIPE OP FLY 95 



SPIRACLE OF FLY 98 



SPIRACLE OP LEATHER-COAT 99 



SPIRACLE OP COCKCHAFER- GRUB 100 



GRUB OP CHAMELEON FLY . . . . . . . .102 



FOOT OP FLY 116 



FOOT OF WATER-BEETLE . . \ . . . .118 



STING OF BEE 127 



GALL-FLY, AND MECHANISM OF OVIPOSITOR . . . .128 



OUTER SAW OP 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 156 



ANTENNA OF COCKCHAFER 162 



ANTENNA OF OAK EGGER MOTH 164 



EAR OP CRAB. 172 



DAPHNIA. . . V 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 OP SPIDER 217 



HEAD OF CHEESE-MITE 221 



BRACHIONUS 232 



MOUTH OF BRACHIONUS . . 235 



