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Poliosia
Hampson
Type species: muricolor Walker,
Borneo.
Hampson (1900) identified no
clearly definitive characters for this genus, but divided it into two sections.
These are represented in Borneo by the typical muricolor group, including
the type species, and the marginata Hampson group, consisting of larger
species where the males have an elliptical androconial patch set in the angle
between Sc and Rs on the hindwing (Fig. 10e; p. 297). All three species in the
latter section occur in Borneo as well as muricolor and some related new
species. Hampson included several further species from the Indian Subregion and
one each from Africa and Australia in the genus, but the placement of these has
not been investigated.
Fig 10e: Poliosia marginata
Hampson |
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The muricolor group
consists of small grey species with a narrowly paler forewing costa, short
labial palps and a darker frons. The male genitalia have a rather rectangular
uncus with a short apical spur and slight ventral angling subbasally. There is a
variably bifid to quadrifid juxta, and the valves have the dorsal part ovate,
with a strong, curved or apically angled process from the sacculus. The saccus
is broad, shallow. The aedeagus vesica has a single small to very large cornutus.
The female genitalia have rather square ovipositor lobes, a moderate ductus with
an asymmetric, sclerotised diverticulum (muricolor) and a small,
spherical bursa full of coarse spines.
The marginata group
has the forewings deeper, more ovate, the facies pale brown to fawn. The male
genitalia have a tapering uncus and a prominent saccus. The juxta is weak. The
saccular process of the valves is strongly flexed but does not extend so far
towards the apex as in the muricolor group. The aedeagus vesica is large,
with two or three diverticula that bear elongate, serrate cornuti at their
apices. No females have been located that can be assigned to this group with
confidence.
No feature has been located
to indicate that the muricolor and marginata groups form a
monophyletic entity.
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