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Arsacia
rectalis Walker
Midea
rectalis Walker,
1863, List
Specimens lepid. Insects Colln Br. Mus., 27: 21.
Arsacia saturatalis Walker,
[1866]1865, List
Specimens lepid. Insects Colln Br. Mus., 34: 1260.
Arsacia
frontirufa Swinhoe, 1885, Proc. zool. Soc. Lond.,
1885: 301, 307.
Amblyzancla
declivis Turner, 1936, Proc. R. Soc. Qd.,
47: 34.
Diagnosis.
The rather narrow forewings of this very small catocaline are divided into a
darker brown basal half and a medium brown distal half by a straight line
running from the apex to just basal to the centre of the dorsum.
Geographical
range. Indo-Australian tropics to Queensland and Solomons.
Habitat
preference. Seven specimens were taken at 900m in lower montane forest on
the limestone G. Api during the Mulu survey. One was also taken at 1365m on
Bukit Retak in Brunei. One has been recorded in lowland forest at 170m near the
Danum Valley Field Centre in Sabah.
Biology.
The larva was reared in India by Bell (MS). It is cylindrical, with all prolegs
developed. The head is yellowish green. The body is a darkish grass-green,
lighter at the level of the spiracles. There is a faintly darker dorsal line,
and a thin yellow spiracular one where the tracheae show through the skin.
The
larva feeds on young leaves and forms a shelter from two leaves tied together
with silk, though it can sometimes be found in the open. Pupation is in a loose
silken cocoon that incorporates detritus.
The host
plant is Dalbergia (Leguminosae); see also Robinson et
al.
(2001).
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