TRIBE LITHOSIINI
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Macotasa suffusus Talbot  
   
Tigrioides suffusus Talbot, 1926, Sarawak Mus. J., 3(2): 132.


Macotasa suffusus
(x 1.32)

Macotasa suffusus
(x 1.32)


Diagnosis.
This and the next two species are very similar externally. M suffusus resembles M. biplagella Butler in having a straw yellow forewing ground colour and, in males, a rectangular black mark on the forewing costa. In M. tortricoides Walker the ground colour is fawn and the costal black mark is triangular. In the male genitalia the uncus is bifid in suffusus and biplagella but entire in tortricoides and allies. Males of suffusus differ from those of biplagella in having a dark zone at the base of the forewing dorsum and a curved, pale rufous line from the costal rectangle towards the centre of the margin, stopping 3mm short of it. The females of the two species are more similar, but the blackish triangle on the forewing costa is more prominent in suffusus; in the genitalia the base of the ductus is expanded and folded rather than simple and squarish.

Taxonomic note. This species and biplagella are only known from Borneo, whereas tortricoides is related to M. nubecula Moore (India to Burma and Andamans) and M. nubeculoides Holloway (Peninsular Malaysia, Sumatra, Java, Bali).

Geographical range. Borneo.

Habitat preference. The species is frequent to common in a range of lowland to lower montane forest types.

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