Orvasca subnotata Walker
1865, List Specimens lepid. Insects Colln Br. Mus., 32: 502.
1994: 133, syn. n.
Diagnosis. Both sexes resemble somewhat the female of Somena similis (See
Somena similis Moore comb.n) and males of Nygmia atereta Collenette comb. n.,
but the forewing is paler with two distinct, fine, whitish fasciae crossing the
brown area. The elongate valves of the male genitalia and the unusual bilobed
sterigma of the female are also diagnostic.
Taxonomic note. The genitalia illustrated by Schintlmeister for polydorus (his
fig 107) match those of subnotata, as do those of Sundanian females
attributable to polydorus: the difference is in the hindwing, where
Sundanian material is often extensively grey, though forms with a yellow
hindwing do also occur. It is possible that specimens 5, 8 and 9 in Plate
6 of Schintlmeister are all subnotata, though identified as scintillans
and similis (the latter referred to as limbata Butler in the
text, but see below). The specimen identified as subnotata on his Plate
6: 43 is "Euproctis” wilemani Collenette, discussed on "Euproctis"
wilemani Collenette. The
true O. limbata Butler comb. n. (Indian Subregion) has facies
similar to subnotata, but with a grey and white hindwing, and an apical
patch on the forewing that tends to extend basally along the costa. The male
genitalia are more similar to those of the next species: they are illustrated as
subnotata by Kishida (1993).
Geographical range. Oriental tropics to Borneo and Sumatra.
Habitat preference. The species has been taken infrequently in lowland
forest in recent surveys, but can attain pest levels.
Biology. The possibility that this species has been confused with others means
that lists of host records need to be treated with some caution and may
particularly overlap with those for Somena similis. No larval
description has been located apart from those of Moore (1883), who may have
confused Somena species and subnotata. Both his illustrations
indicate the presence of tubercles on Al and A2, so these probably occur in subnotata.
Host records (Sevastopubo, 1940; Browne, 1968; Kuroko & Lewvanich,
1993; unpublished IIE records) include: Anacardium, Mangifera (Anacardiaceae);
Cycas (Cycadaceae); Hevea (Euphorbiaceae); Acacia, Sesbania
(Leguminosae); Areca (Palmae); Citrus (Rutaceae); Litchi,
Nephelium (Sapindaceae); Sonneratia (Sonneratiaceae); Theobroma (Sterculiaceae).
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