Tr. ent. Soc. London, 1897, pp. 343-361.
Acta Univ. Lund. xxxiii. (2) No. 7, 1897.
"Studies," etc., Berlin. ent. Zeitschr. xxx. 1886, p. 153.
Osten Sacken, Berlin. ent. Zeitschr. xxxvii. 1892, p. 450.
Entomologist, xiv. 1881, p. 287. This observation has never, we believe, been confirmed.