Pseudocassyma sundagraphoides Holloway sp. n.

♂♀ 11-12mm. See the generic description. Pseudocassyma retaka Holloway has a broader forewing border with a straighter, less sinuous inner margin. The male genitalia have the valve costal processes relatively longer, more slender in Pseudocassyma retaka Holloway, and the spines from the sacculus are shorter, more unequal in size. The cornuti in the vesica of Pseudocassyma retaka Holloway are longer, more slender, more numerous.

Holotype ♂

SARAWAK: Gunung Mulu Nat. Park. R.G.S. Exped. 1977-8 (J.D. Holloway et al.) Site 8, February, Camp 1, Mulu, 150m, 385470,mixed dipt. for., BM geometrid slide 11286.

Paratypes

• 1 ♀ as holotype, BM geometrid slide 11290
• 1 ♂ general data as holotype but Site 16, March, Long Pala (Base) 70m. 324450, alluv./second. for., 1 ♂ BRUNEI: 300m. Ulu Temburong, rainforest, 30.6.1979 (Lt. Col. M. G. Allen) 1 ♂ LP298, 300 metres, Ulu Temburong, BRUNEI, 10.ii.1982 (T.W. Harman) 1 ♂ SABAH: Brumas, secondary forest, 22.vi. 1991, light trap (Chey, V.K.)in FRC, Sepilok
• 1 ♀ SABAH: Brumas, Eucalyptus deglupta, 14.viii. 1991 (Chey, V.K.) in FRC, Sepilok.

Geographical range

Borneo.

Habitat preference

All material is from lowland forest.

Genitalia: