Ratardidae
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This family contains eight described species and three undescribed arranged in two genera, all from the Oriental Region. Three are known from the N.E. Himalaya, one from Taiwan, three from Borneo and one, Callosiope banghaasi Hering, is known only from undated material (Hering 1925). There are single specimens of undescribed species from Peninsular Malaysia and Sumatra (Fig. 68) and three of one from Burma in the BMNH.
The species are delicate cossoids with fore- and hindwings of approximately equal area and with distinctive rounded margins. In the forewing, vein CuP is weak to absent so there is only one strong anal vein. The fore- wing pattern is characteristically of white blotches on dark blackish brown, or spots of the latter colour on a ground of white, yellow or dull red.
All the specimens in the BMNH are female as are those referred to by Hering. The antennae are weakly bipectinate over the whole length. The genitalia (Fig. 88) show marked similarity to those of the Metarbelidae.
