, 14-15mm. This is a very similar species to ereboides but is slightly smaller, blacker, with more irregular postmedial fasciation on the upperside. The 101 underside is more uniform. However, the most striking differences are in the genitalia. The male has the valve apex tapering to a sinuous point rather than being distinctly bifid. The aedeagus vesica contains a prominent, crook-like structure that is lacking in ereboides, but the aedeagus itself is shorter. The respective lengths of the aedeagi are reflected in those of the ductus bursae of the females; this is longer in ereboides.
Holotype. NORD BORNEO: Mont Kina Balu, 5.8.1903 (John Waterstradt), BM noctuid slide 19490.
Paratypes: 2 as holotype; 1, 1 (slide 10804) SARAWAK: Gunong Mulu Nat. Park, R.G.S. Exped. 1977-8 (J.D. Holloway et al.), Site 21, March, W. Melinau Gorge, 130m, 423576. alluvial / kerangas bank; 1 (slide 10802); 1 (slide 10803) SARAWAK as previous but Site 22, April, W. Melinau Gorge, 150m. 421578, wet kerangas; 1 BRUNEI: 300m, Ulu Temburong, rainforest, 24.4.81 (Lt. Col. M.G. Allen).
Geographical range. Borneo.
Habitat preference. Rarer than ereboides, material of terroides with precise data has also been taken only in lowland forest, with a bias during the Mulu survey towards heath forest.
