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Euconosia
obscuriventris sp. n.
Conosia
aspersa ab. obscuriventris Strand, 1922, Lep. Cat., 26: 853.
 11-12mm, 
15-16mm. In facies, the species is often suffused with
dark brown scales irregularly over the forewing, especially in the female. It is
distinguished from aspersa and xylinoides by genitalic characters.
In the male, the hairy margin to the upper part of the valve is dense only at
the apex; the aedeagus vesica is large relative to those of the other species,
with a terminal cornutus that is slender (though broadly based) and appressed.
The female has a narrow ductus bursae that lacks sclerotisation, and the corpus
bursae has a smaller, spherical appendix bursae centrally and a single signum
at its distal end.
Holotype
SARAWAK: Gunong 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., MV-mainly canopy, BM
arctiid slide 2790.
Paratypes:1
(slide 5109), 1 (slide
5112) as holotype; 1 data as holotype but
Site 11, river, understorey,
slide 5110; 1 (slide 5119) Baram, BORNEO
(holotype of ab. obscuriventris).
Other material (not
dissected): 3 as
holotype, 1 Site 11; 1 Ulu Temburong
Expedition 1978, BRUNEI,
Base Camp, 300m, m.v. light, 9.x. 1978 (T.
W. Harman).
Geographical range.
Borneo,
Batu Is. (between Siberut and Nias, west of Sumatra).
Habitat preference. Bornean
material is from dipterocarp forest on slopes at low elevation.
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