TRIBE SCOPULINI
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Scopula vacuata Guenťe
   
Acidalia vacuata Guenťe, 1857, Hist. nat. Insectes, Spec. Gen. Lep., 9: 504.
   
Acidalia vagata Walker, 1861, List Specimens lepid. Insects Colln Br. Mus., 23: 762.


Scopula vacuata
(x 1.16)



Scopula vacuata
(x 1.16)


Diagnosis. This and the next two species are distinguished from other similar straw-coloured Scopula by the fawn, rather than black, forewing discal mark, variably either a transverse bar or a complete ring. The next two species are larger, S. subdecorata Warren sharing possession of a dark grey tibial hair pencil in the male. In S. hyphenophora this pencil is white; females can usually be distinguished by the massive thickening of the sterigma, evident without dissection. Dissection is needed to separate vacuata reliably from subdecorata. In males of the latter the sclerotised process of the valve is distinctly elbowed, and the cerata of the eighth sternite much more unequal; the female has the sterigma somewhat more complex, though not as massive as in hyphenophora.

Geographical range. Borneo.

Habitat preference. The species is common in lowland forest and can occur as high as 1000m in (lower montane forest zone). Chey (1994) recorded the species frequently in various softwood plantations and secondary forest in the lowlands of Sabah.

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