422 GENERAL INDEX. 



Page. 



Ephemera vulyata, long-lived aquatic larva, pupa, and imago of vol. i. 12, ii. 51 



fourth development of . . . . . . . ii. 53 



season, of appearance of varioiis species of . . . . ii. 55 



Ephemerae of Nature and of Art contrasted ..... ii. 46 



Eriosoma Populi (Gall-aphis of the Poplar) . . . . . i. 183 



Eristalis tenax (Sewer-fly), Rat-tailed larva of, and its tenacity of life ii. 164 



Ermine Moth ( Yponomeuta padella) ..... i. 270 



- caterpillar of ...... i. 271 



Excavated Habitations of the Jetty Emmet and other Ants . . iii. 322 



Experiments of Reaumur and others on the curtailment of insect life . iii. 153 



Eyes of Insects .......... i. 193 



Fable, La Fontaine's, of 'Les Souris et le Chat-huant ' . . iii. 344 



Field-bug, female, practice of conducting her infant brood . . iii. 93 



File and Auger (a compound tool) of the Tree-hopper . . . iii. 328 



Fire-flics (Elatrrnl(p\ description of . iii. 165 



- their naturalization proposed and possible . . . iii. 165 

 Fleas and flieir performances . . iii. 214 



- various species of . . iii. 217 

 Flies, House (Musca domesticd) ....... i. 32 



- appearance of, on emerging from puparium . . . . ii. 31 



lines on, by "Wordsworth ....... i. 35 



mode of walking, flying, buzzing, feeding . . . . i. 37-41 



structure, habits, and uses of ..... i. 36 



- poiscrs, wings, and winglets of ... . i. 43 



- species of, much resembling the House-fly, common as a larva 



on Dock-leaves ......... i. 33 



various species of ........ i. 42 



whence they come and whither they go . . . . i. 33 



Flight, against the wind, of Bees, Butterflies, and some Beetles . . iii. 186 



rapid, of Dragon-flics . . . . . . . iii. 183 



suspensory, of Hawk Moths and Syrphi iii. 184 



Flowers, their various relations with insects . . i. 27, 170, 306 



Forcing of insects to maturity ...... i. 308, 309 



Formic acid . . . . . . . . . . i. 123 



Formica rufa CvVood Ant) .... . i. 87, 90, 122 



rufescens and Formica fusca (Negro Ant) . . . . i. 122 



-flava (Yellow Ant) i. 182 



Fritillaries (Butterflies of the genus Argynnis) ... ii. 124, 125, 126 



