Through the great kindness of a friend, I have received cocoons of Callosamia angulifera. These are stemless, and at once distinguishable from those of C. promethea. This character bears out the theory (see Can. Ent. for April, p. 94) that C.angulifera is the older, more generalized form in the genus. In my work on the Saturnians, June, 1896, I tried to show that the stemmed cocoons of Philosamia, Attacus and C. promethea were specializations and a more modern development, and gave probable reasons for acquirement of the habit of fixing the cocoon to the branches, so that it might not fall with the leaf in the autumn(1.c., pp. 15–16; also Plate 1.)