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Bertula nigra Swinhoe
     Bertula nigra Swinhoe, 1902, Ann. Mag. nat. Hist. (7), 9: 177.

Bertula nigra

Bertula nigra
Figure 36
Figure 65

The characteristics of the male labial palps, forelegs and hindwing margin are as in alpheusalis, but the forewing is various shades of dark grey and black, with the fasciation distinctly irregular compared with that of alpheusalis. Females are similar, though have the medial band slightly broader and variably lightened with medium to pale brown.

Taxonomic note. The male genitalia are very similar to those of alpheusalis, having a rather rectangular valve with a short process at the ventral distal corner. The aedeagus vesica has a massive clawed structure directed basad just distal to the apex of the aedeagus.

Geographical range. Borneo, Singapore.

Habitat preference. All material has been taken at or near the coast (e.g. Pulo Laut, Sandakan), and a series was taken at light on a boat amidst mangrove in the Bay of Brunei.

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