J. New York Ent. Soc. i. 1893, p. 120. See also as to knowledge on the part of ants, Forbes, Eighteenth Rep. Insects Illinois, 1894, pp. 66, etc.
Monograph by Buckton, Ray Society, 4 vols. 1879-1883.
Tr. New Zealand Inst. xxviii. 1895.
A catalogue of Coccidae has recently been published by Mr. T. D. A. Cockerell in Bull. Illinois Lab. iv. 1896, pp. 318-339.
Signoret's papers are to be found in eighteen parts in Ann. Soc. ent. France, 1868 to 1876: the most considerable subsequent systematic papers are those by Maskell in the Transactions of the New Zealand Institute from 1878 to the present time.