TRIBE ARCTORNITHINI n.
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Arctornis discirufa Swinhoe comb. n.  
   
Leucoma discirufa Swinhoe, 1903, Trans. ent. Soc. London, 1903: 384.


Arctornis discirufa


Diagnosis.
This is the smallest of the pale yellow species and has less falcate forewings that are distinguished by a prominent, rufous discal spot. The male genitalia are also distinctive, indicating the species is not closely related to any of the previous three: the uncus is narrow, tapering, and the valve has a curved spine apically in addition to the harpe.

Geographical range. Borneo, Peninsular Malaysia, Sumatra.

Habitat preference. The species is never common but has been recorded from a wide range of lowland forest types, including heath and coastal forests.

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