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Achrosis classeyi sp. n.  

Achrosis classeyi (holotype)

12mm. This species is allied to A. semifulva Pagenstecher comb. n. (Sulawesi and eastwards) and A. obliquilineata Warren comb. n. (N.E. Himalaya to Peninsular Malaysia). There is also an undescribed species in Luzon. The forewings are paler than in the two described species, fawn rather than grey, and the forewing postmedial is fine and oblique as in the Asian species. The antemedial is similarly straight and oblique, compared with more diffuse and irregular in the other species. There is a diagnostic brown dot at the base of the forewing, a marginal brown semicircular patch just anterior to the central angle. This last feature is seen in A. elegans West comb. n. (Luzon) with similarly fawn forewings but diffuse, obscure fasciae. A. elegans has a strong discal spot to the hindwing but this is only weak in A. classeyi and absent in the other species. The male genitalia have the furca pocket conical as in A. semifulva and the spurca group. The aedeagus vesica has a bundle of relatively long, needle-like spines.

Holotype . SABAH: Poring, 1800ft, E. of Mt Kinabalu, 20-23.i. 1976, primary forest (E. W. Classey) BM geometrid slide 12788.

Geographical range. Borneo.

Habitat preference. The holotype is taken in an area of disturbed forest on the lower slopes of G. Kinabalu.

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