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Lignicida Swinhoe
Type
species: echana Swinhoe,
Philippines (Palawan), Bali.
This
genus contains two species with very similar external appearance. The male
antennae are strongly bipectinate, and the labial palps are elongate, with
prominent crests of scales on the second and third segments. The forewings have
a rather unusual shape, narrow, with a centrally angled distal margin, the angle
being as far from the thorax as the apex, which is slightly falcate (the margin
the apex and the angle is very shallowly concave). The distal margin of the
hindwing is shallowly curved anterior to CuA2, where it is bluntly angled. The
ground colour of the wings is ochreous brown to grey-brown, with obscure,
irregular, crenate fasciae. These are often marked at the costa by more
prominent dark wedges, and the reniform is also conspicuous.
In the
male abdomen (the new species below), the eighth sternite has a central corema
supported by a ring of sclerotisation with lateral rods. The tergite is only
narrowly sclerotised centrally except for the anterior margin which is almost as
broad as the tergite and narrowly sclerotised transversely. The uncus is
elongate. There is a moderate scaphium. The valves are paddle-like, with a
bilobed saccular process distally on the neck of the paddle. The blade has
conspicuous ventrally directed setae on its inner surface. The pouch of the
saccus contains deciduous hairs. The aedeagus vesica is as broad as long and
finely scobinate.
In the
female the ventral part of the eighth segment is finely scobinate, the ostium
anterior to this. The ductus is long, with weak longitudinal bands of
sclerotisation. The ovate to elongate bursa arises obliquely, asymmetrically
from it, and has areas of scobination within it, concentrated to form a weak
signum in the distal half.
One
species definitely occurs in Borneo, but the type species, given its
distribution, may also prove to be present.
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