Amyna octo (Guenee)

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 : 168-169

9. * Amyna octo (Guenee) .

Perigea octo Guenee, Spec. Gen., Noct. 1: 233, 1852.

Amyna octo, Hampson, Moths Ind. 2: 251, fig. 142, 1894; Cat. Lep. Phalaenae 10: 468, fig. 132, 1910; Tams, Ins. Samoa 3 (4): 203, 1935; Collenette, B. P. Bishop Mus., Bull. 114: 205, 1935.

Agana, April 17, at light, Bryan ; Fadian , Aug. 19, Sept. 18, reared from Sida , s·wezey; Piti , Sept. 11, Oct. 14, at light, Swezey; Orote Peninsula, Sept. 27, reared from Sida, Swezey.

This variable moth has a very wide range of distribution: southern United States, Mexico, Central America, West Indies, South America, Africa, Arabia, India, Ceylon, Burma, Andaman Islands, Christmas Island (Indian Ocean), China, Japan, Borneo, Samoa, Marquesas, Society Islands, Fiji, Rarotonga, Tonga, Ellice Islands, Gilbert Islands, New Hebrides, Solomon Islands, New Guinea, Australia. Now recorded from Guam for the first time.

The species has 23 synonyms, and aconsiderable variation. J. F. G. Clarke considers that a thorough study of the male genitalia might result in distinguishing several good species in the lot. In his study of the male genitalia of Guam material, it came nearest to specimens from Texas, and was different from material from the Orient.

It was quite common in Guam, the slender, green, looping caterpillars feeding on Sida acuta .