Hyria marginata Swinhoe, 1894, Trans. ent. Soc. Lond., 1894:
Sterrha craspedota Prout,
Diagnosis. See Idaea phaeocrossa
Prout and Idaea vacillata
Walker. The dark markings are redder. The general
colour of the wings is clearer, less blotched.
Taxonomic notes. The male second sternite lacks a pouch, but there are two pairs of
coremata in the abdomen opening laterally between segments 4 and 5, and 5 and
6. The valves are narrow, tapering, but the vinculum is broad with a small
saccus. The female has a globular, spined bursa and a basal appendix bursae. The
ductus is fluted as in the base of the appendix bursa that leads into a long,
spiralled ductus seminalis. I. celativestis Warren (known only
from the holotype male, Peninsular Malaysia) has very similar facies but there
is a fringe of scales in the medial zone of the hindwing underside, and the
hind-tibial hair pencil is more purplish. In the male abdomen there is a pair of
large coremata in the intersegmental membrane just basal to the genitalia: the
aedeagus has many moderate spines in the vesica (single sclerotised patch in craspedota).
Geographical range. N.E. Himalaya, Sundaland.
Habitat preference. The species is infrequent in lowland forest.
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