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Rema Swinhoe
Type
species: costimacula Guenée,
Bangladesh.
Synonym: Trigonodesma
Wileman
& South (type species bimacula Wileman
& South, Philippines).
Poole (1989) treated this genus as distinct, but it is evident (Nye, 1975) that
the name was inadvertently published by Wileman & South from a Hampson
manuscript source when Hampson considered that Rema
might
be a homonym.
The
forewings of species in this genus are on the pattern described below. The
hindwings have a distinct angle on their margin at vein CuA2 and are darker,
only slightly fasciated in a pale medial zone. The male antennae are ciliate,
the forelegs with massive, bifid hair pencils on the femur, and the hindlegs
also with strong tibial pencils. The labial palps have the third segment only
for quarter the length of the second, which is upturned.
In the
male abdomen the eighth segment is elongate as in Ugia,
but the modification is possibly a variation of the framed corematous type, with
the tergite sclerotisation very narrow distal to splayed apodemes, and with the
sternite consisting of a pair of hairy, tongue-like lobes within a somewhat
modified frame structure. The genitalia are also narrow, elongate, the valves
simple, without processes as illustrated. There are small lobes on each side of
the tegumen. The aedeagus vesica has two major scobinate diverticula, one
recurved, the other terminating in a mass of longer spines.
The
female has the ostium between the seventh and eighth segments, the seventh with
some reduction of the rather triangular sternite and extension of the distal
corners of the tergite around its apex. The ductus is short, unsclerotised, and
the corpus bursae is ovate, scobinate throughout, but more densely so distally.
The
genus is probably restricted to the type species. The Himalayan taxon tetraspila
Walker,
combined with Rema
by
Poole (1989), has some superficial resemblance in forewing facies but does not
share other distinctive features.
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