[632] Haworth Lepidopt. Britann. i. 125. An instance is recorded in Scriba's Journal, in which a pupa was not disclosed until the fourth year. B. i. st. iii. 222. Pezold. 170.
[633] Marsham in Linn. Trans. x. 402.
[634] Meinecken found, that of several pupæ of Saturnia pavonia, some kept all winter in a room heated daily by a stove, and others in a cold chamber, some of both parcels appeared in March (none earlier), and some of both had not appeared in July, though evidently healthy. Naturf. viii. 143.
[635] The exclusion of certain moths, &c. from the pupa is probably regulated by the time their eggs require to be hatched, and the appearance of the leaves that constitute their appropriate food.
[636] Mr. Marsham makes a similar observation in Linn. Trans., ubi supr.
[638] The appearance of them sometimes continues to near the end of the month: it began on the 19th, when Reaumur observed them. vi. 480. 488.
[639] Bibl. Nat. E. Transl. i. 103—.
[640] Reaum. vi. 486.
[641] Brahm. 423. 421.