rectiorsilla sp. n.
, 13-14mm. This species is slightly larger and darker than orsilla,
but with similar fine, pale fasciae. However, the costal loop of the forewing
postmedial is somewhat longer because the posterior part of the fascia runs
straighter to the subcostal flexure. The antemedial is straight, rather than
curved as in orsilla,
resembling the illustration of snelleni Semper. However, the submarginal is more prominently
paler than in orsilla and more angled than in snelleni,
particularly at one quarter from the dorsum. The male genitalia have the valves
apically acute rather than rectangular, with the costal margin slightly concave
and the ventral margin strongly curved. The saccular process is small and lacks
a process dorsal to it (present and angled in orsilla).
. SARAWAK: Gunong Mulu Nat. Park, R.G.S. Exped. 1977-8 (J.D.Holloway et al.),
Site 3, January, Camp 4, Mulu, 1780m. 453463 [upper] montane forest, BM noctuid
18380) general data as holotype but Site 23, April, W. Melinau Gorge, 250m.
430558, FEG 4, limestone forest; 2 as
holotype but Site 25, April, G. Api, 900m. 427550, lower montane forest; 1
30-60m, Labi, lowland forest and secondary veg., 11.3.80 (Lt. Col. M.G. Allen);
BORNEO: Kretam, 12.ix.1950 (J.D.H. Hedley).
note. Yoshimoto (1998) recorded a species he identified as C.
the Ryukyu Is. The illustrations of facies and male genitalia indicate that it
is probably rectiorsilla,
hence the geographical range may well be wider than that given below.
range. Borneo, ?Ryukyu Is.
preference. All specimens from the Mulu survey except one specimen are
associated with limestone, the holotype being from the highest altitude in upper
montane forest on G. Mulu. The other two specimens are from the lowlands.
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