Stictoptera grisea Moore,
1867, Proc. Zool. Soc. Lond. 1867: 67.
Stictoptera variegata Hampson,
1912, Cat. Lepid. Phal Br. Mus. 11: 163, syn. n.
Stictoptera grisea Moore;
Holloway, 1976: 18.
Diagnosis. This and the next species have the fine medial line of the forewing more
or less straight, and there is usually a more definite black streak striking the
margin just anterior to the tornus. S. semialba has the postmedial more
heavily black-spotted and the marginal zone of the forewing is distinctly paler
than the rest in the arcuate form; (no. 1,2,3 above), (Stictoptera
semialba Walker (no.2) and (no. 3 above) semialba has a
unique form with a bone-coloured forewing ground with or without fine black
longitudinal streaks along the medial vein in the cell and the cubital vein . (Stictoptera
semialba Walker (no. 1) S. grisea has a unique form with a basal buff area to the
forewing (no. 2), further buff along the tornus and the rest of the wings
generally more mottled (the synonym variegata Hampson was based on such a
specimen). Both species have a form with the basal half of the forewing and the
marginal zone pale bone grey or whitish, and the zone between the medial and the
postmedial dark brown; in this form there is a subbasal black triangle on the
costa in both species but only in grisea does this extend in a narrow,
often slightly broken band to the dorsum; in semialba there is a basal
dark patch subdorsally. (Stictoptera
semialba Walker (no. 3), and (no. 1 above). The male genitalia of the two
species are very similar; the cluster of cornuti in the vesica of semialba is
slightly larger, the individual spines darker, than in grisea, though
this character is only diagnostic for Sundanian material (Holloway 1976).
Geographical range. N.E. Himalaya, Sundaland, Philippines, Sulawesi, S.
Habitat preference. The species is found mainly in upper montane forest.
On G. Kinabalu it was frequent from 1000-2600m, commoner from 1500m upwards.
During the Mulu survey it was found infrequently in upper montane forest on G.
Mulu and singly in the lower montane forest, alluvial forest and low altitude
forest on limestone. In Brunei it has been taken in upper montane forest on
Bukit Pagon and Bukit Retak.
Biology. The species has been reared from Garcinia in India (Mathur et
al. 1954 - 1960).
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