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Brontypena Holland
Type
species: eximia Pagenstecher, Moluccas, New Guinea.
This is
one of four genera where the labial palps are extremely elongate and directed
forwards and where the forewings are relatively narrow. The others are the
monobasic Ptyorhyncha Hampson (type species argyresthis
Hampson,
N.E. Himalaya), Corcobara Moore (see below), and Latirostrum
Hampson
(type species bisacutum Hampson, N.E. Himalaya, with a second species, japonicum
Miyake,
from Japan). All the other three genera have the forewing margin bifalcate to a
varying degree, whereas in Brontypena it has a gentle curvature that continues smoothly
round the tornus to the dorsum. The forewings have a dead leaf pattern that is
not evident in the other genera. The hindwings can be pale yellow, yellow with a
brown border, or uniformly brown. The male antennae are fasciculate.
In the
male abdomen (ochrocuprea) the eighth segment is unmodified. The genitalia
have a slender uncus with a fine apical spine opposed by a distinct scaphium.
The valves are distally complex, divided into a costal digitate process, a
central spine with a slightly stepped dorsal margin, and a much shorter saccular
lobe. The aedeagus vesica has a bundle of numerous moderate cornuti. The male
abdomen in Corcobara is very similar.
In the
female genitalia the ostium is at the posterior of the seventh sternite and
flanked by angular lateral extensions of the tergite which extends somewhat more
distally than the sternite. The ductus is short, sclerotised over the basal
two-thirds, then with a membranous section to a lateral lobe bearing the ductus
seminalis itself slightly basal to a thickened pouch on the other side, before
the expansion into the somewhat pyriform, unornamented corpus bursae.
The
genus contains three species in the Moluccas to New Guinea area and the
Sundanian one below.
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