Explanation of Names
Author of the genus is Packard, 1864. Callo is Latin for thick-skinned. Samia is from Roman mythology. Samia was a daughter of Meander, a river god, and also, an important river in Asia Minor. Most species in the genus were originally classified under Samia. (Based on Internet searches.)
C. promethea is found in eastern North America. C. angulifera is more eastern and does not range as far north. C. securifera is found in the southeast.
Tuskes, pp. 194-200 plate 23--adults, plate 5--larvae.