Miscellaneous Genera II
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Bocula xanthostola Hampson
Bocula xanthostola Hampson, 1926, Descr. Gen. Spec. Noctuinae, p. 227.
Aramuna marginata Moore, 1882, Lep. Ceylon, 3: 36, praeocc.
Bocula xanthostola
Hampson; Holloway, 1976: 35.

Bocula xanthostola

.This and the next three species all have the male hindwings strongly modified by reduction, distortion and the presence of patches of androconial scales. The blackish marginal zone of the forewing, when present, has a subapical notch, but the band and the notch are more shallow than in other species with this feature such as B. quadrilineata Walker. In xanthostola the forewing discal spot is a slightly oblique dash, and the male hindwing is pale straw colour over the posterior two thirds; the androconial patch in the costal zone is darker. No females have been located. See also the diagnosis of the next species.

Taxonomic note. All four species with this type of strongly modified male hindwing have very similar male genitalia, with the valve apex externally falcate.

Geographical range. Sri Lanka, Peninsular Malaysia (Barlow, 1982), Sumatra (HS / ZSM), Borneo.

Habitat preference. The only specimen seen is from an area of disturbed montane forest and cultivation at 1200m near Bundu Tuhan on the slopes of G. Kinabalu.

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