Miscellaneous Genera VI
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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.


Arsacia rectalis

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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