Cerace Walker
Type species: stipatana Walker
DIAGNOSIS
External characters:
Venation:
venation Cerace stipatana Walker
Forewing: All veins separate; chorda and median stem well-preserved, fused with radial stem postbasally; bifurcation of anal veins very long reaching mid-length of wing.
Hindwing: All veins separate; median stem preserved, bifurcate terminally.
Forewing shape and markings:
Cerace xanthocosma male
Forewing long; apex of forewing rounded or notched at vein R 5. Ground colour dark with numerous yellowish spots. Costal fold absent.
Sexual dimorphism:
Antenna fasciculate-ciliate in male, pubescent in female. Sexual dimorphism also expressed in size, shape of wings and colouration.
Genitalia:
Male:
male gen. Cerace xanthocosma
Uncus strong; socii long; gnathos with fairly large terminal plate. Valva with large hairy area, often on delicate fold of membrane forming cucullus-like broadening of disc; transtilla a simple transverse sclerite. Aedeagus broad, stout, weakly sclerotized.
Female:
female gen. Cerace xanthocosma
Distal portion of sterigma with weak concavities and large proximal part which is deeply incised ventrally and fused with swung antrum; the latter distinctly sclerotized except for broad anterior portion from which the ductus seminalis extends; signum in form of a rather large ovate sclerite fold transversely along middle and opening distally.
Early stages:
Larvae of Cerace differ from those of Eurydoxa in having seta SD2 on abdominal segments 1-8 situated on a joined pinaculum with SD1; pinacula are distinctly elevated and sclerotized.
Biology:
Two generations yearly (in Eastern Palaearctic part of its area of distribution); hibernation in the larval stage. Larvae of Cerace xanthocosma are polyphagous.
Distribution:
Oriental Region and eastern part of Palaearctic Region.