Abstract
An annotated species list of carpenter moths (Lepidoptera, Cossidae) of the Altai Mountain Range is presented. It includes 26 species from 3 subfamilies. Two species are new to science: Semagystia tarbagataica Yakovlev, sp. n. and Dyspessa saissanica Yakovlev, sp. n. The former differs from the other species of the genus (except Semagystia enigma Yakovlev, 2007 from southeastern Turkey whose wing pattern is totally reduced) in the absence of wing pattern; a specific clavate shape of the process on the costal margin of valve is also its important diagnostic character. Dyspessa saissanica Yakovlev, sp. n. belongs to the well-revised Dyspessa salicicola (Eversmann, 1848) species group (Yakovlev, 2005); the closest species is D. salicicola, which also has elongate processes of the pectinate antennae and a weakly developed ridge on the costal marginof valve. The newly described species is different in having a poorly developed dark pattern on the forewings, very broad bases of the processes of the transtilla, a thinner base of the aedeagus, and thinner lateral processes of the juxta. In conclusion, the carpenter moth fauna of the Altai Mountains is briefly analyzed.
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