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Eugoa
indeclaratana Walker stat. rev.
Tospitis indeclaratana Walker, 1863, List
Specimens lepid. Insects Colln Br.
Mus., 28:427.
Diagnosis
and taxonomic note. This
species begins a sequence of small, rather noctuid-like members of the genus,
the first few of which have a rather triangular forewing with, in the male, a
convex dorsum that overlaps an area of smooth modified scales at the anterior of
the hindwing. The forewings are usually a uniform, speckled medium brown,
sometimes with a dark discal dot, but species later in the sequence are more
fasciated. The male genitalia often have a distinct saccular process that is
adjacent to or curves over the main part of the valve. The aedeagus vesica
usually has cornuti. E. indeclaratana is
the only species with straw-coloured hindwings, and these are only seen in the
male. Both sexes have a faint discal dot on the forewing, distinguishing the
females (tentatively associated) from those of the next species, as well as a
more finely speckled ground. Both species have the head and patagia straw colour.
This species was placed in synonymy with crassa Walker by Hampson (1900). It is related to E.
vasta
van Eecke (Sumatra) which has a similar setose transtilla structure and
valve shape, but lacks the two cornuti in the aedeagus vesica of indeclaratana.
Geographical
range. Borneo.
Habitat
preference. This
is an uncommon species of lowland forest, being recorded up to about 600m.
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