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“Eilema” trimacula sp. n.  

 "Eilema" trimacula
(x 1.32)

 "Eilema" ?trimacula
(x 1.32)


11-12mm, possible 11-13mm. The forewing venation and shape is as in the previous species, with R2 part of the radial sector branching system. The male colour and facies is also similar, but with a slight suffusion of brown scales over the forewing that are concentrated into spots within the cell and at the disc in a ‘reniform and orbicular’ pattern and also in a diffuse subapical spot. The dorsal patch on the underside is also more conspicuous, dark brown. The possible females have similar forewing venation though, as with those of brevivalva, a more typical Eilema shape. The wings have a pale straw yellow ground colour, the forewing with all except the costa and distal margin dark grey. The male genitalia have long narrow valves as in sandakana, though both saccular and costal parts terminate in a distinctive ‘lobe and claw’ manner. The saccus is narrow, slightly tapering, the juxta weak, and the uncus is set on distinct shoulders. The aedeagus lacks an apical spur, and the vesica has basal lobes that are scobinate and a longer diverticulum that terminates in a shallow cornutus. The genitalia of the possible females are somewhat similar to those of brevivalva but have a distinctly more sclerotised, narrow, tubular basal part to the bursa and a pyriform, concentrically crinkled, scobinate distal part within which are two nipple-like signa. There is a slight appendix at the base of the tubular section. The ostium opens into another pouch-like zone of the eighth segment. E. fumidisca Hampson, known from a single female from Burma, has very similar genitalia but a more typical Eilema facies like females of Brunia species, the forewings grey with a pale costal zone.

Holotype SARAWAK: Gunong Mulu Nat. Park, R.G.S. Exped. 1977-8 (J.D. Holloway et al.), Site 16, March, Long Pala (Base) 70m. 324450, alluvial/ second. for., BM arctiid slide 2638.

Paratypes: 2 as holotype; 1 as holotype but Site 7, January, 50m; 3 as holotype but Site 8, February, Camp 1, Mulu, 150m. 385470, mixed dipt. for.; 2 as holotype but Sites 14, 15 (slide 5419), February, Camp 2.5, Mulu, 1000m. 413461, lower montane for.; 1 Baram distr., SARAWAK (Chas Hose); 1 BRUNEI: 3m, Seria, secondary and coastal veg., 20.11.79 (Lt. Col. M.G. Allen); 1 (slide 5417) MALAYSIA: Sabah, Danum Valley, 170m, 4º58’N, 177º 48’E (S.J. Willott), 1º understorey ER, East Ridge DVFC, 22.vii.94.

Possible : 7 (slide 4899) SARAWAK as above, Sites 7, 8, 16, 23; 1 Danum Valley as above but 1º canopy Tree Pltfm DVFC, 26.ix.93.

Geographical range. Borneo.

Habitat preference. The species has been mostly taken in lowland dipterocarp forest, and was particularly frequent in alluvial forest during the Mulu survey. A few specimens have been taken in lower montane forest at 1000m. The females are all from lowland forest.

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