TRIBE ARCTORNITHINI n.
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Arctornis hedleyi sp. n.  


Arctornis hedleyi (holotype)


12mm. The wings are uniformly satiny white with conspicuous grey triangles at the margin in the spaces, larger on the forewing, which has a discal spot of the same colour. These triangles are more intense than in larger, more satiny species such as poecilonipha and riguata described earlier. They occur also on the underside. The frons and palps are pale rufous, the latter rather long. The legs lack dark spots, but are rather worn. The male genitalia have a long, narrow uncus. The valve apex is diagnostic, with a scobinate dorsal lobe and a smaller, less scobinate ventral one, with an acute projection in between, its ventral side serrate. The harpe is just longer than the valve, slightly upturned at the apex.

Holotype . B. N. BORNEO: Kretam, 7.ix.1950, (J.D.H. Hedley), B.M. 1950- 497, BM lymantriid slide 2135.

Geographical range. Borneo.

Habitat preference. The type locality is coastal.

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