J. Linn. Soc. Zool. xiii. 1878, pl. xxi. f. 2.
Canadian Entomologist, xvii. 1885, throughout.
Jena. Zeitschr. Naturw. ix. 1875, pl. xii. See also Stokes in Science, xxii. 1893, p. 273.
Ann. Hofmus. Wien, i. 1886, p. 183.
Jena. Zeitschr. Naturw. ix. 1875, p. 257.