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Chasmina sundana sp. n.. 
Chasmina tibiopunctata Bethune-Baker sensu Holloway, 1976: 15.

Chasmina sundana

22-24mm. In facies this species resembles C. coremata but is larger, with the black dots at the vein ends more strongly developed, particularly over the tornal half; in nigropunctata Bethune-Baker they are stronger over the anterior half. In the male genitalia the valves are narrower basally, broader at two thirds than in nigropunctata, apically less rounded, and with hair setae less evenly distributed over the basal zone, much denser exteriorly and towards the base of the valve. In a similar species from Sulawesi (slide 14215,? celebensis Snellen) the valve is very broad, almost oblong, but broader basally.

. BRUNEI: 1500m, Bukit Retak (Lt. Col. M.G. Allen) 19 May 1979, BM noctuid slide 14216.

: 3 examples as holotype, but 1618m, different dates; 1SARAWAK:  Gunong Mulu Nat. Park., R.G.S. Exped 1977-8 (J.D. Holloway et al.), Site 27, April, G. Api, 1500m, Pandanus Camp, 429541, Scrub, Pandanus; 1 SARAWAK as above but Site 1, January, Camp 4, Muly 1790m, 452463, upper montane forest.

Geographical range
. Borneo, Sumatra, Peninsular Malaysia.

Habitat preference
. The species is found from the lowlands to the upper montane zone, but is perhaps more frequent in the latter.

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