Abstract
The subfamily Periacminae is characterized by the structure of the valva, with sacculus sharply separated from the remaining part of the valva. The subfamily includes two tribes: Periacmini Lvovsky, 2005 (with four genera: Periacma Meyrick, 1894; Irepacma Moriuti, Saito et Lewvanich, 1985; Ripeacma Moriuti, Saito et Lewvanich, 1985, and Epiracma Wang et Li, 2005) and Meleonomini Lvovsky, trib. n. with two genera Meleonoma Meyrick, 1914 and Phaulolechia Diakonoff, 1951. A key to the genera based on the characters of the moths’ appearance and genitalia is provided. The following new synonymy is established: Meleonoma Meyrick, 1914 (= Acryptolechia Lvovsky, 2010, syn. n.), and Phaulolechia Diakonoff, 1951 (= Variacma Wang, 2006, syn. n.). Four new species of Meleonoma are described from Nepal: M. nepalella sp. n., M. jubingella sp. n., M. dierli sp. n., M. montana sp. n.; and M. meyricki sp. n. is described from China. Eight new combinations are established: Meleonoma malacobyrsa (Meyrick, 1921) comb. n., Meleonoma facunda (Meyrick, 1910), comb. n., Meleonoma torophanes (Meyrick, 1935), comb. n. (all from Acryptolechia), Meleonoma flavimaculata (Christoph, 1882), comb. n. (from Euteles), Meleonoma peditata (Wang, 2006), comb. n. (from Cryptolechia), Phaulolechia saccata (Wang, 2006), comb. n., Phaulolechia subrotunda (Wang, 2006), comb. n., and Phaulolechia isotyra (Meyrick, 1938), comb. n. (all from Variacma). Meleonoma facialis Li et Wang, 2002 originally described from China was recorded in the Russian Far East, Nepal and Indonesia (Java).
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