[EF] Curtis, Hist. of Brown-tail Moth, 4to. London, 1782. [EG] Réaumur, ii. p. 137. [EH] Salisbury, Hints on Orchards, p. 53. [EI] Hardy's Travels in the Interior of Mexico, p. 32. [EJ] Hill's Swammerdam, part i. p. 23. [EK] Swammerdam, part i. p. 24. [EL] Intr., vol. i. p. 415. [EM] Kirby and Spence, vol. i. Intr. p. 416. [EN] Porcupines do not shoot out their quills, as was once generally believed. [EO] Lister, Hist. Animalia Angliæ, 4to. p. 7. [EP] Phil. Mag., ii. p. 275. [EQ] Vol. i. Intr., p. 417. [ER] Phil. Mag.,, ii. p. 339. [ES] Nat. Hist. of Selborne, vol. i. p. 327. [ET] Book of Nature, part i. p. 25. [EU] Hist. Anim. Angliæ, 4to. [EV] Mémoires, vol. vii. p. 189. [EW] Spectacle de la Nature, vol. i. [EX] Book of Nature, part i. p. 25. [EY] Animal Biography, vol. iii. p. 475, 3rd edition. [EZ] Brez, Flore des Insectophiles. Notes, Supp. p. 134. [FA] Thomson's Ann. of Philosophy, vol. iii. p. 306. [FB] Loudon's Mag. of Nat. Hist., vol. i. p. 322. [FC] Experim. Researches in Nat. Hist., p. 136. [FD] Mag. Nat. Hist., vol. i. p. 324. [FE] Linn. Trans., vol. xv. p. 456. [FF] Mag. Nat. Hist., vol. ii. p. 397. [FG] Linn. Trans., vol. xv. p. 453. [FH] "----L'un des bouts de ces premiers fils, afin que le vent ou un courant d'air pousse l'autre extrémité de l'un d'eux au de là de l'obstacle."--Dict. Classique d'Hist. Nat., vol. i. p. 510. [FI] Evelyn's Travels in Italy. [FJ] Book of Nature, part i. p. 24. [FK] Bloomfield's Remains, vol. ii. p. 64, _note_. [FL] Animal Biography, iii. 470-1. [FM] Mém. de l'Acad. des Sciences pour 1707, p. 339. [FN] Kirby and Spence, Intr. i. 419. [FO] Darwin's Zoonomia, i. 253, 8vo. ed. [FP] Mém. Soc. d'Hist. Nat. de Paris, An. vii. [FQ] Mém. Soc. d'Hist. Nat. de Paris, p. 125, and Latreille, Hist. Nat. Géuér. viii. p. 163. [FR] Kirby and Spence, Intr. i. 425. [FS] Aranei Suecici, Stockholm, 1757. [FT] Mém. des Araign. Aquat., 12mo. Paris, 1799. [FU] Clerck, Aranei Suecici, cap. viii. [FV] De Geer, Mém. des Insectes, vii. 312. [FW] Spectacle de la Nature, i. 58. [FX] Linn. Trans. vol. xv. [FY] Spectacle de la Nature, i. p. 61. [FZ] Remains, ii. 62-5. It is a remarkable fact, as recorded from personal observation by Mr. Bell (British Reptiles), that the toad swallows the cuticle detached from its body during the moult which it undergoes. [GA] Spectacle de la Nature, i. 119. [GB] Introduction, ii. 449. [GC] Hist. des Moeurs et de l'Instinct, vol. ii. [GD] Entomologie, par R. A. E., p. 242. Paris, 1826. [GE] Elements of the Philosophy of Plants, Eng. Trans., p. 285. [GF] Flore Franç. Disc. Préliminaire. [GG] Réaumur, vol. iii. [GH] In order to prevent ambiguity, it is necessary to remark that the excrescences thus called must not be confounded with the true galls, which are occasionally found in the gall-bladder. [GI] Réaumur, Mém. iv. 505. [GJ] Mém. iv. 538. [GK]