Type species: hypocrites
This genus is
established for those species of Thalassodes with rather a more bluish
green tone to the wings and either rather punctate fasciae with an enlarged
white spot of the forewing postmedial at the dorsum (typical group) or only very
faint fasciae and a white discal spot on the hindwing (O. floccosa Prout
comb. n. group). In some species there are marginal red, and sometimes white
markings: these tend to be of uniform intensity over both wings rather than
stronger towards the hindwing angle as in Thalassodes.
Definitive features are
located in the male abdomen. There are no setal patches on the third stemite.
The eighth segment is expanded laterally, and both sternite and tergite are
modified, the former broad, the distal margin produced into lobes on each side,
usually cleft (floccosa group) or with further processes centrally
(typical group). The tergite is narrow, longer than the sternite, its distal
margin bifid or Y-shaped. In the genitalia the socii are narrow as in Thalassodes.
The vinculum is only weakly cruciform and there are no coremata. The valves
are unornamented with an oblique fold often in the position of the structure of Thalassodes,
though there is sometimes a pair of sclerotised, spinous zones associated
with the juxta, and a small flap near the transtillae as in some Thalassodes.
The female genitalia of
the type species have typically modified ovipositor lobes and a bicornute signum.
The ductus is long, tapering slightly basad, and has a central lateral lobe. The
ostium is narrow surrounded by minor buckling of the lamellae vaginalis.
The species are usually
montane. As well as the five Bornean species discussed below, the genus also
includes the following species: O. aptifimbria Prout comb. n. (N.E.
Himalaya); O. leucospilota Moore comb. n. (Sri Lanka); O. vivida Prout
stat. & comb. n. (Seram); .O. absimilis Warren comb. n. (S.
Moluccas, New Guinea, Bismarcks); O. simplex Warren comb. n. (S. Moluccas,
Sulawesi). Three of these species, leucospilota, vivida and absimilis,
are closely related, having similar male genitalia and a bidigitate process
in the centre of the distal margin of the eighth sternite.
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