J. S.  Taylor, ?Notes on Lepidoptera in the Eastern Cape Province (part III)?, Journal of the Entomological Society of Southern Africa, vol. 16, pp. 143-167, 1953.

G. F.  Knowlton, ?Observations on Celerio lineata, the White-lined Sphinx, in Utah?, Lepidopterists' News, vol. 7, pp. 11-12, 1953.