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Arctornis plumbacea Swinhoe comb. n.  
Cobanilla plumbacea Swinhoe, 1903, Fasc. Malay., 1: 62.

Arctornis plumbacea

Both plumbacea and ouria Collenette (See Arctornis ouria Collenette comb.n) have rather translucent pale brown or greyish brown wings with, on the forewing, a diffusely darker discal spot and a sinuous postmedial row of spots. The forewing margin has a diagnostic central angle in plumbacea, and the postmedial row of spots is nearer the margin, broader. Females of each are much paler, the ground colour bone-white.

Taxonomic note. Both species have R1 and R2 arising independently from Rs at the cell, though R2 in ouria has a brief anastomosis with R5 beyond the branch of R5. The male genitalia in both have a strongly bifid uncus and a double harpe on the valve.

Geographical range. Peninsular Malaysia, Sumatra, Borneo.

Habitat preference. This is a rare species of lowland forest, but records from near the Danum Valley Field Centre indicate it can persist in logged forest.

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