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Idaea
vacillata Walker
Acidalia? vacillata Walker,
1862, List Specimens lepid. Insects Colln Br. Mus., 26: 1608.
Chrysocraspeda phaenicozona Hampson,
1895, Trans. ent. Soc. Lond., 1895: 313.
Diagnosis. The purple borders of the wings are almost twice as broad as in phaeocrossa.
See Idaea phaeocrossa Prout.
Taxonomic notes. Subspecies phaenicozona is larger, with dark grey, rather than
pale straw, male hind-tibial scent-pencils. The male genitalia lack a pouch on
the second sternite but the valves have basal coremata. The aedeagus is large,
the vesica with three cornuti (much more even in size and smaller in phaenicozona).
In the female, the bursa has a broad, complex, highly spinose basal portion
and a narrower, elongate, immaculate distal portion.
Geographical range. Borneo, Peninsular Malaysia; N.E. Himalaya, Hong
Kong, Tonkin (ssp. phaenicozona).
Habitat preference. In recent surveys four specimens have been taken in
dry heath forest at Telisai and one in hill dipterocarp forest at Ulu Temburong,
both lowland localities in Brunei.
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