TRIBE LITHOSIINI
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Macotasa orientalis Hampson  
   
Phaeosia orientalis Hampson, 1905, Ann. Mag. nat. Hist. (7), 15: 433.
   
Ilema pentaspila Hampson, 1907, Ann. Mag. nat. Hist. (7), 19: 231.


Macotasa orientalis
(x 1.32)


Macotasa orientalis
(x 1.32)


Diagnosis.
The medial row of black spots on the yellow forewing of the female is diagnostic. The male is more typical of the genus in appearance, but has the black costal mark smaller than in other Bornean species; the forewing has a more orange tinge, and the modified scales at the base of the costa are reduced.

Taxonomic note. M. dimorpha Hampson (Philippines) is related, and shows similar sexual dimorphism, though the association of such males with such females requires further confirmation (Holloway, 1982).

Geographical range. Burma, Peninsular Malaysia, Borneo.

Habitat preference. Two males have been taken in the vicinity of Kuching, Sarawak, whilst, of three females, two are from lowland forest at 300-350m in the Ulu Temburong of Brunei and one is from about 600m at Poring, east of G. Kinabalu.

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