Pareustroma Sterneck

Type species: propriaria Leech, China.

A single female of a species that most probably belongs to this genus has been taken on G. Kinabalu and is described below. All other species occur in the region from the Himalaya to western China and were illustrated by Xue & Zhu (1999), who recognised seven species, two described as new. The facies resembles that of some Eustroma Hübner and also has similarities to Ecliptopera Warren and Photoscotosia. The medial band of the forewing has a paler central zone at the costal end particularly prominent in the new Bornean species, and may be interrupted along CuA2. In the male, both the forewing and the hindwing have a tuft or row of hairs along the underside on their dorsal margins, features shared with Hysterura Warren, another closely related genus, but one where the hindwing margin is angled at CuA1, this vein being stalked with M3.

The male genitalia, are typical of the Cidariini, with the valves simple, with a diagnostic setose lobe at the base of the costa but arising from the anellus as described in the tribal description. These lobes are unusually doubled in Pareustroma and Hysterura, each component bearing an apical hair-pencil. The aedeagus vesica in both genera has two rows of spines.

In the female genitalia, the signum in both genera is a scobinate patch restricted to the centre of the corpus bursae as most Eustroma rather than more of a band as in Ecliptopera. However, Pareustroma is distinguished by an area of sclerotisation with some pleating at the base of the corpus bursae, a feature that appears to be present in the seemingly deformed corpus bursae of the Bornean species (Fig 88), though a signum is not evident.