Durrant, Ent. Mag., xxxi. 1895, p. 107.
"The Yucca moth and Yucca Pollination," Rep. Missouri Botanical Garden, 1892, pp. 99-158.
The maxillary tentacle is considered by Prof. J. B. Smith to be a prolongation of the stipes, cf. antea, p. 309; also Insect Life, v. 1893, p. 161.
Chapman, Tr. ent. Soc. London, 1894, p. 366.
Walter, Jena. Zeitschr. Naturw. xviii. 1885. He did not distinguish Eriocephala as a genus, as we have explained on p. [308].