[493] Except some species of Polyammatus Latr. (Thecla, Argynnis F.), P. Argiolus, Corydon, &c., and Hesperia Rubi, Betulæ F., &c. Some of the larvæ of the former become pupæ within the stalk of some plant, or partly under the earth: those of the latter usually in a leaf to which the abdomen is fastened by various threads. These last are the rouleuses of the butterfly-tribe, living, like some moths, in leaves that they have rolled up. N. Dict. d'Hist. Nat. xxiv. 499.
[494] Plate [XXIII.] Fig. 1. a.
[495] Plate [XXIII.] Fig. 8. a.
[496] Bonnet is of opinion that this twirling process is not with any view to get rid of the exuviæ, but is caused only by the irritation occasioned by the spines of the skin of the caterpillar when they touch that of the pupa. Œuv. ii. 109.
[497] For the above account see Reaum. i. Mem. x. xi.
[498] N. Dict. d'Hist. Nat. vi. 291—.
[499] De Bombyc. 24.
[500] i. 498.
[501] De Bombyc. 43.
[502] N. Dict. d'Hist. Nat. vi. 294.