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Comostola
pyrrhogona Walker comb. n.
Eucrostis pyrrhogona Walker,
1866, List Specimens lepid. Insects Colln Br. Mus., 35: 1610.
Jodis marginata Lucas, 1895, Proc. Linn. Soc. N.S. Wales (2)3:
1267.
Pyrrhorachis cornuta Warren,
1896, Novit. zool. 3: 292, syn. n.
Pyrrhorachis pyrrhogona augustata Prout,
1917, Novit. zool. 24: 305.
Pyrrhorachis cornuta sspp.
callicrossa Prout, pisochlora Prout, woodfordi Prout, 1934,
Gross-Schmett. Erde 12:131-132, syn. n.
Pyrrhorachis pyrrhogona succornuta Prout,
1937, Novit. zool. 40:181.
Pyrrhorachis cornuta exquisitata Fletcher,
1957, Nat. Hist. Rennell I. Br. Solomon Is., 2: 60,
syn. n.
Pyrrhorachis pyrrhogona subcrenulata Holloway,
1977, Norfolk I. Philatelic Bulletin 3.
Diagnosis. Both this and the next species have pale blue-green wings with
marginal red beading. At the forewing tornus this is narrow with a slight
cornute extension in Bornean pyrrhogona but conspicuously broadened in C.
turgescens Prout.
Taxonomic notes. The taxa pyrrhogona and cornuta have usually been
treated as distinct (e.g. by Prout, 1934, Gross-Schmett. Erde 12: 131,
though with the suggestion that they might be conspecific), the main difference
being in the presence of a small tornal projection from the forewing red beading
in populations attributed to cornuta. Forms attributable to pyrrhogona
occur in the Indian Subregion and the S.E. Australasian part of the range,
with cornuta forms recurring from Sundaland to the New Guinea area.
Features of the male genitalia include: a slender spine enfolded in the sacculus;
a row of two or three long setae distal to it arising from the interior of the
valve (more marginal or lost in more easterly races). The taxon in Fiji referred
to pyrrhogona by Robinson (1975) has male genitalia similar to those of C.
rhodoselas Prout comb. n. from Samoa.
Geographical range. Indo-Australian tropics from India to Taiwan, and east to Vanuatu,
New Caledonia, N. Australia and Norfolk I.
Habitat preference. During the Mulu survey most specimens were taken in lowland
dipterocarp forest; the exception being from 1000m in lower montane forest, on
G. Mulu. A further specimen from 945m on G. Monkobo, Sabah, has also been seen.
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