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Lopharthrum Hampson
Type
species: comprimens Walker,
Bangladesh.
The
rather angular grey wings have diffuse and irregular brown fasciation as well as
diagnostically irregular, reddish suffused, creamy patches distal to, and
partially incorporating, postmedial rows of lunules. Three of these lunules are
white in the forewing. The hindwing patch is larger and contains the darker
zig-zag of the submarginal. The forewing is slightly bifalcate, resembling Goniophila
somewhat,
but the hindwing margin is more irregular and angled most strongly at M3. The
male antennae are ciliate. The labial palps are upcurved, with a very short
third segment. The male hind-tibia is long, with a ventral crest of scales.
In the
male abdomen, the eighth tergite is unmodified but the sternite has its anterior
margin narrowly sclerotised and extended considerably on each side as slender
sclerotised rods. Distally, the central portion supports a pair of pleated,
deeply rugose, wing-like structures. In the genitalia, the uncus has a dense
crest of hairs. The valves are largely divided into an apically bifid costal
process and a paddle-shaped saccular to apical section. The juxta is a
rhomboidal plate with an inverted, V-shaped ridge centrally. The aedeagus is
slender, sinuous, with a small vesica that bears about five small cornuti.
In the
female, the complex, folded ostium is broad and set within the posterior part of
the eighth segment. It narrows abruptly into the first, straight, sclerotised
section of the ductus that broadens again at its distal end into a robust
spherical chamber that gives rise to the ductus seminalis. The spherical corpus
bursae is beyond this after another constriction.
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