Genus

Clethrorasa Hampson, 1908, “ Cat. Lepid. Phalaenae Br. Mus. ” 7: 15 [key]; Hampson 1910, “ Cat. Lepid. Phalaenae Br. Mus. ” 9: 343. Type species: “ Leocyma pilcheri ” Hampson, 1896, by original designation.

Description.

Adult. Wingspan 29.0–38.5 mm. The color of head, dorsal side of thorax, patagia, tegulae, and forewings nearly white. Antennae black-brown and linear. Proboscis well developed, with the labial palpus extending upward. Forehead smooth and devoid of protrusions. Compound eyes large. Two pairs of prominent black spots located in disc area of thorax, patagia with pair of black spots; each side of metathorax displaying a cluster of radiating white hairs. Abdomen mostly black; several segments of abdominal base adorned with brushes on dorsal side; anal tuft white, extending straight out from the posterior end of abdomen; tufts of hair arranged on lateral sides of abdomen white at distal half. Legs generally black, with white ring at each segment on the base of tarsus. Forewings slightly narrow, with scattered black, metallic blue glossy dots, blocks, or stripes. Hindwings broad, grayish-brown or partially light brown. Male genitalia. Uncus long with a simple structure; tegumen relatively wide; valva regular, with slight protrusions and absent harpe; vinculum slender; saccus shaped like a “ V ”; aedeagus cylindrical, featuring a tie-shaped vesica and moderately abundant cornuti. Female genitalia. Papillae anales nail-shaped and slightly flattened; anterior and posterior apophysis processes relatively slender; ductus bursae short and simple; corpus bursae relatively regular in shape, with longitudinal folds and no appendix bursae.

Distribution.

China, India, Nepal, Bhutan, Vietnam, Thailand, Malaysia, Indonesia, Brunei (Fig. 22).