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Idaea
ptyonopoda Hampson
Acidalia ptyonopoda Hampson,
1895, Trans. ent. Soc. Lond., 1895: 313.
Diagnosis. This and the next species have facies typical of a large number of
straw-coloured, lightly fasciated. Oriental species and are more reliably
distinguished by genitalic examination. I. ptyonopoda has distinctly
maroon hindtibial scent-pencils in the male. The male genitalia have an enlarged
seta subapically, ventrally on the valve. The aedeagus vesica has a single
cornutus with a rather sinuous flexure centrally. The female has the bursa
immaculate rather pyriform, extending basally beyond the insertion of the ductus,
from where there is also a short lateral diverticulum or appendix.
Taxonomic notes. The male second sternite has a prominent pouch. A specimen from
Peninsular Malaysia (slide 18575) has the aedeagus vesica strongly spined in
addition to the major cornutus. It may represent a distinct species.
Geographical range. N.E. Himalaya, Hong Kong, Borneo, ?Peninsular
Malaysia.
Habitat preference. A male was taken at 1000m in lower montane forest on
G. Mulu. A female (slide 18526) from about 1700m on G. Kinabalu is probably also
ptyonopoda as it compares well with three from a larger series from Hong
Kong.
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