The 1933 experiment in hybridizing Tropaea luna with Actias selene closed in the following manner:

Cocoons of Actias selene, formed in August, hatched in September, and the moths mated. A second brood of larvae was reared on rose leaves (purchased wholesale after the winter set in) but, owing to the difficulty of keeping this food supply fresh, the disease called Flatchery claimed all of the brood except one larva. The single cocoon, spun in December, gave us a female the following June, but this moth refused to mate with males of Tropaea luna.