Characoma albulalis Walker, 1863, List Specimens lepid. Insects Colln Br.
Mus., 27: 107.
This is the first of a sequence of four species
with similar facies and male genitalia. Males in two of the species, but not
albulalis, have the hindwing tornus produced and adorned with longer scales.
The tegumen is considerably expanded where it overlaps the vinculum, and this
overlap is only exceeded in
Moore. The forewing facies of albulalis resembles that of the
generally larger metalophota Hampson very closely but lacks the modified
male hindwing of that species; also the male genitalia have a somewhat less
pronounced overlap of the tegumen. In both sexes, albulalis has the
anterior half of the forewing medial zone less variegated, but both species have
forms where this is dark grey; in metalophota this dark grey extends more
strongly back to the dorsum.
Taxonomic note. This group has an unusual structure of the base of the
abdomen in both sexes (Fig 152), with bulbous apodemes supported from a slender,
frame-like structure within the basal sternite.
Geographical range. Borneo.
Habitat preference. The species is frequent in a range of forest types from
the lowlands to about 1800m.
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