Heterusinula Bryk

Type species: dichroa Jordan.

This genus contains one extremely rare species currently known only from females. The wings on both surfaces are pale yellow with dark brown borders. The inner margins of the borders are more strongly concave (that of the forewing more oblique) than in the similarly monobasic Pseudoscaptepsyle circumdata Walker (India, Peninsular Malaysia, Sumatra), and the dark areas occupy a smaller proportion of each wing. The border on the hindwing underside lacks the weak turquoise shade seen in circumdata. The patterns of both taxa are similar to those of lithosiine arctiids in the genera Scaptesyle Walker, and Pseudoscaptia Hampson (Holloway, 2001).

The female genitalia of P. circumdata have the ovipositor extensile as in other Chalcosiini, and the seventh sternite has its distal margin with a sclerotised trapezoid process, not seen in Heterusinula, where the ovipositor is equally extensile, but with shorter apodemes. The ductus and corpus bursae are relatively much shorter in Heterusinula. Pseudoscaptepsyle Hering is placed in Clade 12 of the analysis of Yen et al. (2005), well within the Chalcosiini.