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Peratophyga
sobrina Prout
Xenostega sobrina Prout, 1932, J. fed. Malay States Mus., 17:
81.
Peratophyga sobrina Prout;
Holloway, 1976: 84.
Diagnosis. This is the largest species in the genus. The extensive bluish grey
shading to the wings almost completely obscures the pale yellow transverse bands
which are evident as a faint, diffuse irroration, concentrated somewhat at the
dark sagittate marks of the postmedials.
Taxonomic notes. The ear-like structures of the uncus shows some variation in size and
form (illustrated). Those variations may prove to show some constancy within the
localised populations into which this species is fragmented. Lowland specimens
tend to have the ‘ears’ slightly larger, more produced apically to well
beyond the uncus. One of two Kinabalu specimens dissected had them unusually
broad.
Geographical range. Borneo; specimens from Peninsular Malaysia (FRIM
collection) may also be this species but identity should be confirmed by
dissection.
Habitat preference. The species in infrequent in the upper montane forest
zone of G. Kinabalu, G. Mulu and Bukit Retak. It also occurs in lowland heath
and swamp forest habitats; wet kerangas near the Melinau Gorge N. Sarawak; dry
kerangas at Telisai, Brunei; swamp forest at Badas, Brunei.
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