[421]

Ofv. Ak. Forh. xi. 1854, p. 302, pl. v., since confirmed by others, see Giard, C.R. Ac. Sci. cix. 1889, pp. 79 and 708.

[422]

Natural History of Aquatic Insects, 1895, p. 198.

[423]

Ent. Zeit. Stettin, vi. 1845, p. 384, pl. i.

[424]

Ann. Soc. ent. France (6) iii. 1883, p. 23, pl. i.

[425]

Ent. Nachr. xviii. 1892, p. 13.