Xenosoma flavisedes Dognin, 1891 Dognin, P. (1891). Diagnoses de quelques Hétérocères du Vénézuéla. Le Naturaliste (2) 5 (13e année): 121. Translated from the French original. Xenosoma Flavisedes, n. sp. 55 millimetres. The four wings are white, transparent, with the veins clearly visible, and furnished with a white fringe. Head yellow, front of the thorax and tegulae yellow, edged with white, underside of the thorax yellow, upper and under side of the abdomen white, anus yellow. Inside of the legs clothed with white hairs, outside brownish black. Palpi yellow with the tips black, proboscis yellow, antennae black. This species is close to Nigricosta Feld. and to Nigromarginatum Druce. It is easily distinguished from Nigricosta in that the costa of the forewings is white above as well as below and is covered with blackish hairs only on its outer edge, and from Nigromarginatum by the purity of the white of the wings and of the abdomen. One female from Merida. Hering, M. (1925). Pericopidae. In: Seitz, A. (ed.), The Macrolepidoptera of the World, vol. 6, The American Bombyces and Sphinges. Alfred Kernen, Stuttgart; p. 429, pl. 60 d. X. flavisedes Dogn. (60 d). Body whitish, head, collar, thorax below, patagia and 2nd palpal joint and anal tuft ochreous yellow, 3rd palpal joint black. Wings quite whitish hyaline, at the margins, particularly before the apex of the forewing, more densely dusted with a somewhat greyish colour. Venezuela.