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Malagonia Hampson
Type
species: acypera Hampson, N.E. Himalaya.
The
forewing shape and facies of the two species in this genus are reminiscent of Lineopalpa
species
such as birena
Holloway,
but the transverse fasciae are more numerous and all straight, consisting of
subbasal, antemedial, postmedial and submarginal white lines amid grey that is
darkened distally adjacent to each. The medial is weaker and more irregular,
broken at the rather obscure reniform stigma. The hindwings are plain grey with
an obscurely paler, slightly oblique postmedial fascia. The labial palps are
long and slender, and the male antennae are fasciculate. The phragma lobes at
the anterior of the second abdominal tergite are shallow.
The male
abdomen indicates that the genus is not related to Lineopalpa
or
other Scoliopterygini. The apodemes of the basal sternite are very short,
obtuse. The eighth sternite contains a frame-like area of thickening with
distinctly rounded corners, but there is no obvious corema inside this. The
tergite is slightly pouched distally and has thickening along the anterior
margin that extends into the mid-line. The genitalia have a simple but long
uncus; there is no scaphium. There is a distinct and narrow saccus. The valve is
narrow, with a distal spine on the sacculus converging with a process from the
costa at its centre. The straight aedeagus has a rather simple, asymmetrically
triangular vesica that lacks ornamentation except for minor diverticula towards
its base.
The
female genitalia of the new Bornean species have the ostium opening between the
seventh (unmodified) and eighth segments. The intersegmental membrane
surrounding it is finely scobinate and forms a pair of shallow pockets flanking
it, directed obliquely outward and anteriorly. The ductus is short, narrow,
constricted centrally. The corpus bursae is narrow, pyriform, about eight times
the length of the ductus. It is unornamented.
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