[186]

See Plateau, Bull. Ac. Belgique, xv. 1888, p. 28; in reference to structure of ocelli, Blanc, Tête du Bombyx mori ... 1891, pp. 163, etc.; and Landois in Zeitschr. wiss. Zool. xvi. 1866, p. 27.

[187]

Entwickelungsgeschichte der Schmetterlinge, Cassel, 1815.

[188]

Tr. Linn. Soc. London, Zool. 2nd Ser., v. 1890, pp. 147, 148.

[189]

For information as to the structure and function of the silk-vessels, refer to Helm, Zeitschr. wiss. Zool. xxvi. 1876, p. 434; and Gilson, La Cellule, vi. 1890, p. 116.

[190]

Jahresber. Schlesisch. Ges. lviii. 1881, p. 116.