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Chorsia
brewini sp. n.
 ,  9-10mm. The forewings are a pale bone colour with greyish
clouding, and curved fasciation in the medial to postmedial area: a fine dark
brown arc from a weak costal triangle that runs through the transverse discal
dash; a band of ground colour; a white band; a greyish band only slightly darker
than the ground. All except the dark brown arc are rather diffusely defined, and
even that broadens and becomes more diffuse at the dorsum. The male abdomen
suggests a relationship to the much more heavily marked and variegated maculosa and griffini:
the prominent, highly developed coremata that bear dark brown scales; the
central apodeme on the seventh sternite. In the genitalia, the valves are
slightly shorter than in maculosa
and
centrally slightly broader because of the more evenly convex costal margin. The
aedeagus is narrow as in griffini, the vesica has the diverticula even
narrower, and the most distal one has a terminal cornutus and each has more
general rugosity more basally. Chorsia aroa Bethune-Baker
(New Guinea, Seram) comb. n. has somewhat similar facies but the male genitalia
(slide 18908); Seram) have broad, distally bilobed valves that are slightly
rugose, and the eighth segment does not have highly developed coremata. The
species also bears some resemblance in facies to the Japanese C.
albicincta Hampson
comb.
n. (see
discussion of Neustrotia
Sugi
above), but in this the curved fasciation of the forewing is more distal, and
the male genitalia differ in valve shape and ornamentation and in having massive
cornuti in the aedeagus vesica.
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Chorsia
brewini
(paratype) |
Holotype
. SARAWAK: Gunong Mulu Nat. Park, R.G.S. Exped. 1977-8 (J.D.Holloway et al.),
Site 25, April, G. Api, 900m, 427550, lower montane forest, BM noctuid slide
18515.
Paratypes:
12
as
holotype; 1 general data as holotype but Site 26, April, G. Api Pinnacles,
1200m 428545, open scrub.
Geographical
range. Borneo.
Habitat
preference. The species is common in lower montane forest on limestone.
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