Chorsia wattsi Holloway sp. n.

Diagnosis

♂ 9mm. The size and colour are somewhat as in C. brewini Holloway. The forewings are a pale, slightly vinous grey, marked more darkly with vinous brown. The postmedial is more emphatic than the medial, extending sinously (rather than being evenly curved) around the dark brown discal mark, this being broader, more diffuse, containing a pair of pale spots (it is a simple transverse black dash in brewini). There is a small, ovate dark mark distal to the discal mark, set between the postmedial and the submarginal. The genitalia are similar to those of brewini but the valves are relatively rounded, extending well beyond the apex of the uncus, rather than to the same distance. The aedeagus vesica bears a cornutus almost three times as large as that of brewini, more as in dinglei where the valves do not extend beyond the uncus. The eighth segment is similar, but the coremata of the sternite in brewini are represented by diffuse hair pencils only in wattsi.

Holotype ♂

SARAWAK: Gunong Mulu Nat. Park, R.G.S. Exped. 1977-8 (J.D.Holloway et al.), Site 24, April, W. Melinau Gorge, 270m. 430558, FEG 4, limestone forest; BM noctuid slide 19580.

Geographical range

Borneo

Habitat preference

The only specimen is from lowland forest on a steep limestone slope.

Taxonomic Note

Chorsia wattsi sp. n. (Plate 6, Fig 124) G 9mm. The size and colour are somewhat as in C. brewini Holloway. The forewings are a pale, slightly vinous grey, marked more darkly with vinous brown. The postmedial is more emphatic than the medial, extending sinously (rather than being evenly curved) around the dark brown discal mark, this being broader, more diffuse, containing a pair of pale spots (it is a simple transverse black dash in brewini). There is a small, ovate dark mark distal to the discal mark, set between the postmedial and the submarginal. The genitalia are similar to those of brewini but the valves are relatively rounded, extending well beyond the apex of the uncus, rather than to the same distance. The aedeagus vesica bears a cornutus almost three times as large as that of brewini, more as in dinglei where the valves do not extend beyond the uncus. The eighth segment is similar, but the coremata of the sternite in brewini are represented by diffuse hair pencils only in wattsi. *Holotype *G. SARAWAK: Gunong Mulu Nat. Park, R.G.S. Exped. 1977-8 (J.D.Holloway et al.), Site 24, April, W. Melinau Gorge, 270m. 430558, FEG 4, limestone forest; BM noctuid slide 19580. Geographical range. Borneo Habitat preference. The only specimen is from lowland forest on a steep limestone slope.

Genitalia: