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 54 H 



398 ILLUSTRATIONS. 



37 Eyes of My gale avicularia . . . . .125 



38 Mygalc ccementaria . ./ . . . . , ib. 



39 Lycosa vorax ib. 



Dolomedes marginatus . ib. 



Ctenus dubius . ib. 



Sphasus indianus ....... ib. 



Attus parus ..... ib. 



Eresus cinnnberinus ib. 



Thomisus citreus . . . . . . ib. 



Clubiona accentunta .*..... ib. 



Dysdera erythrina ib. 



Segestria perjida ....... 126 



Tegenaria domestica ib. 



Epeira diadema ........ ib. 



Thoridion coronatum 126 



Latrodecta i3-guttata ib. 



Argyroneta aquatica ....... ib. 



ad of the worker-bee 127 



55 Eyes of the male bee . i . . . . ib. 



56 Tt-tropS prcensta 128 



57 Eyes of ditto, greatly magnified ...... ib. 



58 Gyrinus natator . . i ib. 



59 Eyes of ephemera, greatly magnified , i . . ib. 



60 Eyes of the bee, greatly magnified 131 



61 Section of the eye of the dragon-fly ; . -. -. 133 



62 Section of the eye of the stag-beetle ..... 138 



63 Section of a compound eye, showing the course of the light . 139 



64 Giant cockroach (Blatta giganted) . . . . . 152 



65 Praying mantis (Mantis religiosd) . . . 157 



66 Virgin dragon-fly (Calepteryx Virgo) . : . . .160 



67 Tongue of the bee, with its muscles and sheath . j . 172 



68 Structure of the bee's tongue ...;.. 173 



69 Larkspur (Delphinium choilanthum), and Columbine {Aquilegia 



bicolor), showing the horn-shaped nectaries .... 175 



70 Aphis Quercus, real size and magnified -. . . . 178 



71 Sucker of the Aphis Quercus, magnified . . . . ib. 



72 Eriosomamali, and an infected apple-branch .... 179 



73 Suckers of the black-horned bug (Cimex nigricornis) magnified 184 



74 Magnified figures Of the sucker of a water-bug (Nepa neptania) 187 



75 Suckers of the flea, greatly magnified . . 189 



76 Chigoe (_Pulex penetrans) v 19} 



77 Magnified figures of the sucker of the gnat .... 195 



78 Modes of operation of the gnat's sucker . i 196 



79 Male and female gnat, magnified 197 



80 The cleg (Hcematopota pluvialis") 201 



81 Parts of the cleg magnified, to show the sucker . . . ib. 



82 Sucker of Sphinx celerlo 204 



83 Male spider, with the palpi magnified ..... 210 



84 Male and female stag-beetle . . . . i 4 .211 



85 Male and female Bombus ....... 212 



86 Clenophorajlaveofata ........ 218 



87 Ctenophora drnata : . . . ib. 



88 Male and female glow-worms 224 



89 Head of male glow-worm il>. 



90 Fire-fly (Elater noctilucus') . 228 



91 Lantern-fly (Fulgora lanternaria) 229 



92 Electric centipede (Scolopendra electrical . . . .230 



93 Monophora noctiluw , 232 



