Tasta
chalybeatoides sp. n. Tasta chalybeata Warren sensu Holloway, 1976: 85.
Tasta
chalybeatoides (paratype)
,
13mm. This and the next three species are paler than those described
above. In chalybeatoides the fasciae are more clearly delineated, and the
forewing has a distinct dark discal bar as in T. chalybeata from Sulawesi.
The hindwing ocellus is similarly oblique, with the long axis of the ellipse
more parallel to the margin than in other species, with the yellow surround
broader along the distal side. The male genitalia resemble those of chalybeata
in having a somewhat hooked cornutus in the vesica and a scattering of small
setae in the centre of the valve, but the former is accompanied by an additional
distal cornutus and the latter by a semicircular flange or flap near the ventral
margin. There are no digitate processes on the valve. The genitalia of T.
reflexa Swinhoe resemble those of chalybeata.
Holotype .SARAWAK: Gunung Mulu Nat.
Park, R.G.S Exped. 1977-8 (J.D. Holloway et al.) Site 15, February, Camp
2.5,Mulu, 1000m, 413461, [lower montane forest], BM geometrid slide
15511.
Paratype: 2as holotype (slide 15514);4 as
holotype but site 14; 1
SABAH: Mt Kinabalu, ‘Power Station’, l930m, vii-ix
1965, Cambridge Expedition to Mt Kinabalu 1965 (H.J. Banks, H.S. Barlow &
J.D. Holloway) Brit. Mus. 1968-186, BM geometrid slide 9371.
Geographical range. Borneo.
Habitat preference. Apart from the single specimen from G. Kinabalu at
1930m, all material seen is from the lower montane forest (1000m) on G. Mulu.
13mm. This and the next three species are paler than those described
above. In chalybeatoides the fasciae are more clearly delineated, and the
forewing has a distinct dark discal bar as in T. chalybeata from Sulawesi.
The hindwing ocellus is similarly oblique, with the long axis of the ellipse
more parallel to the margin than in other species, with the yellow surround
broader along the distal side. The male genitalia resemble those of chalybeata
in having a somewhat hooked cornutus in the vesica and a scattering of small
setae in the centre of the valve, but the former is accompanied by an additional
distal cornutus and the latter by a semicircular flange or flap near the ventral
margin. There are no digitate processes on the valve. The genitalia of