Amer. Natural. xxix. 1895, pp. 636 and 803.
Wood, Ent. Mag. xxvi. 1890, p. 148.
See Chapman, Tr. ent. Soc. London, 1893, p. 255.
Osten Sacken, Tr. ent. Soc. London, 1884, p. 501, and Berlin. ent. Zeitschr. xxxvii. 1892, p. 423, etc.
Osten Sacken has recently discussed the intermediate conditions, and proposed the name "pseudholoptic" for some of them, Berlin. ent. Zeitschr. xli. 1896, p. 367.