Two new species of the subgenus Cryptanaema de Vos of the genus Cyana Walker from eastern Indonesia (Lepidoptera: Erebidae: Arctiinae: Lithosiini: Nudariina).

Two new species of the subgenus Cryptanaema de Vos, 2017 of the genus Cyana Walker, 1854 are described from eastern Indonesia: Cyana (Cryptanaema) ngata sp. n. (Western New Guinea) and Cyana (Cryptanaema) sibela sp. n. (Maluku Islands). Adults, male and female genitalia of the new and similar species are illustrated.

The genus Orieosia Bucsek, 2012 also found in New Guinea, with description of two new species (Lepidoptera: Erebidae, Arctiinae, Lithosiini).

The genus Orieosia Bucsek, 2012 appears to be present in New Guinea too. Four species have been discovered in New Guinea to belong to this formerly believed to be Oriental genus. Two already known species, Lambula hypopolius Rothschild, 1916 and Utriculofera tetrastigmata Rothschild, 1916, are transferred to the genus Orieosia Bucsek, 2012. Orieosia stenoptera spec. nov. and O. albigrisea spec. nov. are described as new to science. Nomenclatorial confusion with Holocraspedon hypopolius (Rothschild, 1916) is discussed.