Ischyja ferrifracta Walker 

Potamophora ferrifracta Walker, [1863] 1864, J. Linn. Soc. (Zool.), 7: 177.

Potamophora schlegelii Snellen, 1884, Notes Leyden Mus., 6: 87.

Ischyja glaucopteron Hampson, 1891, Illustr. typical Specimens Lep. Het. Colln Br. Mus. Colln Br. Mus., 8: 19, 88.

Diagnosis

The pale brown wedge dividing the forewing apex identifies both sexes of this species. The male has a distinctive loop containing leaden-grey on the dorsum at one third that is separated from an 8-shaped patch of a similar grey distal to the reniform by a zone of fawn speckles on black. The ventral constriction of the 8 is produced by a distal tooth from the reniform. The male hindwings are only slightly suffused blue basal to a clearly defined, narrow, pale blue postmedial fascia.

Geographical range

Borneo, Peninsular Malaysia, Java, Lombok, Dammer, Thailand (VK), India, Hainan, Japan.

Habitat preference

The only Bornean material seen is the holotype, collected in Sarawak by A.R. Wallace, probably taken in the lowlands, a male from G. Marapok in Sabah and a male from lowland forest in the Barito Ulu of Kalimantan Tengah.

Genitalia: