I am able to complete the history of M. phaeton, part of which I communicated to the Can. Ent. in Jan'y, 1869, vol. 1, p. 59.The eggs are laid in large clusters of from 200 to 400 each, upon the under side of leaves of chelone glabra. They are sub-conical, truncated, ribbed on upper half, yellow when laid, but soon turn to crimson. In 19 or 20 days, as Mr. Scudder informs me, they hatch As the eggs found by me (13th June) had been deposited some days, I could not verify that point.