SYNOPSIS. xvu 



Number of facets of compound eyes, i88; Scudder's figures, 

 1 88. Characteristic form of antenna?, 1 88. Burgess on Striic- 

 ttire and Action of a Biitterjiys Trunk, 189. Legs supporting 

 rather than locomotive organs, 190. Reduction of first pair of 

 legs correlated with reduction of prothorax, 190; brush-footed 

 butterflies or Nymphalidte, 190. Distinguishing characteristic 

 of wings, significance of term " Lepidoptera," 190. Scudder's 

 Biitterjiies recommended to teachers, 191. Migrations of milk- 

 weed butterfly, 191. Metamorphosis, 192. Markings of eggs, 

 192. Voracious habit of larva, 192. Structure of mature larva, 

 spinneret, thoracic legs and abdominal prop-legs, 192, 193. 

 Transformation of larva into pupa, of pupa into imago, 193-195. 

 Length of life of milkweed butterfly, 195. Heterocera, 196. 

 Tclea Polyphemus the type, 196. Broad junction of thorax and 

 abdomen, 196. Characteristic form of antennce, 196. Reduc- 

 tion of mouth parts, 196. F'orward legs useful as organs of 

 support, 196. Habits of tlie caterpillar, 198. Trouvelot's ob- 

 servations on food plants of larva, 198. Poulton on young Le- 

 pidopterous larvae forming special relations with food plants, 198. 

 Amount of food consumed by larvLis of Telea, Trouvelot's experi- 

 ments, 199. Pupa and cocoon, 199. Effects of temperature on 

 development, 200. Tineidse, 200. Structure of Tinea pelli- 

 07iella, 200. Fringed wings, 201. Tineidae with footless larvce, 

 effects of habit of mining leaves upon structure, loss of loco- 

 motive organs and power of motion, 202. Resemblance of the 

 larva of Nepticula to larva of a Dipteron, 202. Absence of 

 footless larvae among butterflies, 202. Phalsenid^e, 203. Differ- 

 ences between the fall and spring canker-worm, 204. Position 

 taken by larva a probable means of protection, 204. Noctuidce, 

 205. Travelling of army- worm an abnormal habit, 205. Rav- 

 ages in 1770, 1 861, 1875, 206, 207. Length of life of larva de- 

 pendent upon temperature, 207. Cut-worms, 207. Bomby- 

 cid^e, 207. Eff'ects of domestication upon Boinbyx inori, 208. 

 Sphingidee, 208. Consolidation of thoracic rings correlated 

 with rapid flight, 208. Length of sucking-tube, 208. Legs as 

 supporting organs, 208. Ingenious contrivance for fastening 

 wings together and increasing power of flight, 208. Compari- 

 son of ruby-throated humming-bird and humming-bird moth, 



