Ann. Soc. ent. France (2) v. 1847, p. 46.
Perris, in Ann. Soc. ent. France (2) v. 1847, p. 37, pl. i.
Ann. Soc. ent. France (5) i. 1871, Bull. p. lxvii.
Rep. Dep. Agric. Ent. Washington, 1886, p. 492.
Cf. Réaumur, Mem. v. 1740, p. 21; and Perris, Ann. Soc. ent. France (4) x. 1870, p. 190.