ILLUSTRATIONS. V 



^9 Larkspur {Delphinium choilanthum) , and Colum- 

 bine (Aquilegia bicolor), showing the horn-shap- 

 ed nectaries, 175 



70 Aphis Quercus, real size and magnified, 178 



71 Sucker of the Aphis Quercus, magnified, ib. 



72 Eriosoma mali, and an infected apple-branch, 179 



73 Suckers of the black-horned bug {Cimex nigricor- 



7iis) magnified, 184 



74 Magnified figures of the sucker of a water-bug (JVepa 



neptunia), 187 



75 Suckers of the flea, greatly magnified, 189 



76 Chigoe (Pulex penetrans), 191 



77 Magnified figures of the sucker of the gnat, 195 



78 Modes of operation of the gnat's sucker, 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 celerio, 204 



83 Male spider, with the palpi magnified, 210 



84 Male and female stag-beetle, 211 



85 Male and female Bomhus, 212 

 S6 Ctenophoraflaveolata, 218 



87 Ctenophora ornata, ib. 



88 Male and female glow-worms, 224 



89 Head of male glow-worm, ib. 



90 F\re-^y {Elater noctilucus), 228 



91 Lantern-fly (Fulgora lanternaria) , 229 



92 Electric centipede {Scolopendra electrica), 230 



93 Monophora noc.tiluca, 232 



94 Tremhley's breeding apparatus, 237 



95 Reaumur's breeding apparatus, . 237 



96 Aphis of the elm, magnified, 248 



97 Aphis of the willow, magnified, ib. 



98 Common gnat {Culex pipiens), ib. 



99 Marsh-fritillary {Melitcea artemis), 264 



100 Six-spot burnet moth {Anthrocera jilipendulcB), ib. 



101 Spiders' webs on iron railings, 282 



102 Reaumur's large pyramidal hive, 283 



103 Swarm of bees on a laburnum tree branch, 286 



104 Swarm of 40,000 bees on a fig-tree, and R aumur's 



apparatus for weighing them, 291 



105 Structure of the sting of the common-bee, 325 



106 Poison bag of the bee, magnified, 326 



107 Breeding-cage, with gauze doors and glass slides, 364 



108 Larvae-box and pocket collecting box, 368 

 VOL. XII. A* 



