[652] Pullein in Phil. Trans. 1759. 54.

[653] Annals of Botany, ii. 104.

[654] Political Essay on N. Spain, iii. 59.

[655] Voyage dans l'Amer. Merid. i. 212. It may here be observed as a benefit derived by the higher walks of philosophy from insects—that astronomers employ the strongest thread of spiders, the one namely that supports the web, for the divisions of the micrometer. By its ductility this thread acquires about a fifth of its ordinary length. Nouv. Dict. d'Hist. Nat. ii. 280.

[656] American Phil. Trans. v. 325.

[657] Anderson's Recreations in Agriculture, &c. iv. 399.

[658] P. [147], &c.

[659] Clark in Linn. Trans. iii. 304.

[660] Bonnet, ii. 344.

[661] The Rev. Dr. Sutton of Norwich made similar observations upon the proceedings of this insect in his garden for two successive seasons.