Margaronia

Swezey, O. H., 1946, Lepidoptera, Geometridae, Arctiidae, Agrotidae, and Pyralidae of Guam, Insects of Guam II, Honolulu, Hawaii: Bernice P. Bishop Museum Bulletin 189, pp. 163-185 : 182-183

33. Margaronia species.

A green species near marginata was reared from a colony of caterpillars which had webbed together the terminal leaves on a branch of Ochrosia mariannensis in the forest at Machanao , June 4. There were 54 caterpillars in the colony. From them, 34 moths issued June 18-21 (some as cripples, which were not saved); 15 larvae and pupae died; thread worms issued from three; tachinid larvae issued from two (one of these died in puparium, the other issued a cripple).

The full-grown caterpillar was 30 mm. long; light yellow, with the tubercles broad, flattish, shining black, giving the caterpillars a black appearance, setae fine, pale, short. Spiracles nearly circular, yellow, margined with white. Head uniformly light brown, eyes black. Legs black, yellow tipped. The usual abdominal prolegs, pale.