Arctornis nigrobustus sp.
Holloway, 1976: 43.
Arctornis nigrobustus (holotype)
18-20mm. This is a robust-bodied, translucent-winged species, the wings
scattered with narrow, dark, forked, scales that become denser and darker
towards the distal margin where they and the fringes are almost blackish. There
is a slight discal spot on the forewing formed by broader scales. The frons has
a black bar between the antennae, with two black spots below it, partially
joined to it. The palps are black above, grading more whitish below, and there
are some dark patches on the legs. The male genitalia have a rather tongue-like
uncus and a diagnostic, scobinate, foot-like harpe to each valve, that only
extends two- thirds of the distance to the apex. This and the blackish scaling
of the wings appear to be unique within the genus. The genitalia may indicate a
relationship to prasioneura Toxopeus and allies discussed below.
Holotype SABAH: Mt Kinabalu, Park H.Q., 1620m, vii-ix.1965, BM lymantriid slide
Paratypes: 1 general data as holotype but ‘Lycaenid Cut’, 1660m; 5 (slide 1103)
general data as holotype but ‘Power Station’, 1930m.
Geographical range. Borneo.
Habitat preference. This is a montane species, records being from 1620m
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