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Siglophora
Butler
Type
species: bella
Butler, Borneo.
The forewings have more extensive areas of yellow on the wings, usually
basally and towards the apex on the costa, but these are crossed by squiggly
lines of the reddish brown colour. The male hindwing may be modified in various
ways: an excavate distal margin, with androconia on the underside of the dorsal
lobe; a zone of scent scales along the dorsum; a fovea on the costa. The centre
of the forewing costa of
S.
ferreilutea
Hampson males has a swelling invested with tufts of curved hairs that distorts
the anterior venation. There is no areole in the forewing, and the radial sector
branching is (R2 (R3, R4)), all other veins arising independently. All hindwing
veins are present, with M3 and CuA1 stalked.
The male abdomen lacks basal tymbal structures, and the eighth segment has
apodemes similar to those of Chandica but closer together, those of the
tergite longer and divergent. As in Chandica, the intersegmental membrane
between A8 and the genitalia is much expanded. The genitalia have coremata
rather than hair pencils at the bases of the valves, which are broad, ovate,
with a similar field of peg-like setae apically to that of Chandica, but
more irregular. The aedeagus apex and small vesica have irregular fields of
spines.
The female has a short, broad ductus and a pyriform bursa that may have an area
of sclerotisation but lacks scobination or a signum.
The first two species have excavate male hindwings, broad valves with extensive
apical fields of pale peg-setae. The rest have them narrower with much more
limited, roughly circular fields of darker peg-setae. In
haemoxantha
Zerny, cymographa Hampson and
langei
Kobes the anellus/manica around the aedeagus is broad, darkened and, in the last
two, bears two spines; the last two also have many fine spines on the aedeagus
vesica.
The genus is entirely
Oriental with its diversity greatest in Sundaland, its most easterly extent.
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