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Nola
bifascialis
Walker
Pisara bifascialis Walker, 1864 [1865], List Specimens lepid. Insects
Colln Br. Mus., 31: 244.
Diagnosis and taxonomic note.
This and the next three species are all small with
transverse greenish brown banding of various shades and thus may be related to
similar species such as
N.
mesotherma
Hampson (Sri Lanka) and N. erythrostigmata. This species is externally
inseparable from mesotherma, sharing the pale brownish green transverse
banding of the forewing that is somewhat darker in the medial zone between the
postmedial and antemedial, though this is broken by a paler band just basal of
centre that is more obvious towards the costa. This pattern is slightly more
variegated in bifascialis. The male genitalia have the valves deeply
cleft, each slender arm expanding towards the apex. The harpe in both species is
relatively distal, a slender, distally directed spine in mesotherma and a
more broadly based, slightly basally directed spine in bifascialis. The
aedeagus of mesotherma has a coxcomb-like cornutus on the vesica, lacking
in bifascialis. The apodemes of the eighth abdominal segment are also
similar. The female has a broad, sclerotised, tubular ductus and a globular
corpus bursae, lacking signa, but having a slight distal appendix. The specimen
from Sandakan listed under erythrostigmata by Hampson (1900) is in fact
bifascialis.
Geographical range. Borneo.
Habitat preference. All material is probably from the lowlands, three
recently collected specimens from disturbed areas with secondary forest: Anduki;
Ulu Temburong; Danum Valley.
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