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Thyas coronata Fabricius comb. n.
Noctua coronata Fabricius, 1775, Syst. Ent.: 596.
Noctua leonina Fabricius, 1775, Syst. Ent.: 596.
Noctua ancilla Fabricius, 1794, Ent. Syst. III, 2: 17.
Corycia magica Hübner, 1827, Zuträge Samml. exot. Schmett., 3: 32.
Ophiodes ponderosa Mabille, 1879, Annls Soc. ent. Fr., (5) 9: 346.
Anua coronata Fabricius; Holloway, 1976: 2.
Ophiusa coronata Fabricius; Kobes, 1985: 36.

Thyas coronata

. The facies of this large species is unmistakable, particularly the yellow hindwings with two black bands and the black tinged yellow abdomen. The forewing reniform can be black or obscure.

Taxonomic note. The species is transferred to Thyas because it shares the diagnostic facies features, such as the variable reniform, and has the larval characters that Thyas shares with Artena. An Australasian relative of coronata, hituensis Pagenstecher (Holloway, 1979) should also be transferred to Thyas, comb. n.

Geographical range. Indo-Australian tropics to Micronesia and the Society Is.

Habitat preference
. Records are infrequent, and the species may not come readily to light, but they are from forests, disturbed habitats and offshore islands (Karaman Is.) in the lowlands up to 2600m, where eight specimens came to light, possibly hill-topping, as the species is a known migrant.

Biology. The larva was described by Bell (MS), Gardner (1941, 1947) and Sevastopulo (1939a), and described and illustrated by Bigger (1988). The young larvae are green with black spots, slender. The mature larva is also of typical slender ophiusine shape with the head prognathous. Head and body are striped longitudinally. The stripes are alternate pale fawn and darker purplish fawn, (these are relatively broader on the head), separated by fine darker brown lines. There is a sequence of three of the darker stripes on each side, and a thinner dorsal one that is expanded into ellipses on A5 and A6. The dorsolateral stripes contain a pair of small, pale yellow tubercles on A8. The prolegs of A3 and, to a lesser extent, A4 are reduced. These features are identical to those of the larva of T. juno illustrated in Sugi (1987), particularly the dorsal ellipses; see above.

The eggs are laid in a group on the bark of a branch. Bigger gave details of the length of the life stages, the whole cycle lasting 51-57 days.

The host-plants (Robinson
et al., 2001) are Combretum, Quisqualis, Terminalia (Combretaceae), Litsea (Lauraceae), Anamirta (Menispermaceae), Pinus (Pinaceae), Nephelium (Sapindaceae). Bigger (1988) only recorded it from Terminalia.

The adult is a well-known piercer of fruit (Wu, 1981; Bänziger, 1982; Kuroko & Lewvanich, 1993).

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