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Ophiusa disjungens Walker
Ophiodes disjungens Walker, 1858, List Specimens lepid. Insects Colln Br. Mus., 14: 1360.
Anua disjungens ab. timorensis Strand, 1913, Arch. Naturgesch., 79 (A7): 171.
Ophiusa disjungens Walker; Kobes, 1985: 35.
Minucia indiscriminata Hampson, 1893, Illustr. typical Specimens Lepid. Het. Colln. Br. Mus., 9: 111.
Anua tongaensis Hampson, 1913, Cat. Lepid. Phal. Colln. Br. Mus., 12: 434.

Ophiusa disjungens

. This and the next species have similar, rather narrow, pale, biscuit-coloured lightly marked forewings and yellow hindwings with a black submarginal patch. In disjungens the postmedial is darker, punctate, as distinct from a slightly paler but obscure and irregular fascia. Both species have grey patches distal to the submarginal: the apical one is strongest in disjungens; in discriminans Walker there is a prominent grey ellipse at the tornus. In discriminans the abdomen has a distinctive subapical black patch dorsally. See also the description of the previous species.

Geographical range. Oriental tropics (ssp. indiscriminata); Lesser Sundas, Australia, New Caledonia, vagrant to Norfolk I. (typical); Vanuatu, Fiji, Samoa, Tonga (ssp. tongaensis). The species also occurs on Guam.

Habitat preference. The only specimen noted in recent surveys was from 1618m on Bukit Retak in Brunei.

Biology. Hampson (1893) and Sugi (1987) illustrated the mature larva in colour. It is a long, relatively slender and streamlined semi-looper that is variegated greyish brown. The finer patterning is longitudinal banding but superimposed on this is more oblique or transverse variegation that is coarser, blackish on A2, A3 and A5, the latter with extensive white markings on each side that are more intense on alternate longitudinal bands. A transverse ridge on A8 is edged darker posteriorly. The whole effect is cryptic, twig-like. Semper (1896-1902) illustrated a more reddish brown larva with black longitudinal striae.

The host-plant recorded by Sugi was
Psidium (Myrtaceae), and Common (1990) and Robinson et al. (2001) added Eucalyptus and possibly other Myrtaceae; there is also a record of Styphelia (Epacridaceae) from Guam (Swezey, cited by Holloway, 1979).

The adult has been recorded as a fruit piercer in China (Wu, 1981) and Thailand (Bänziger, 1982).

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