To the knowledge of long-horned beetles (Coleoptera: Cerambycidae) of the Oriental Region (with new synonymy). Part 4.

The article summarizes faunistic data on 82 rare and little-known species of long-horned beetles, collected in the Oriental Region and deposited in the beetle collection of Daugavpils University, Latvia (DUBC). New data on 14 species presents the first faunistic information after their original descriptions, and ten taxa are recorded for the first time for the local fauna: Cacia flavoguttata Breuning, 1968, Cenodocus laosensis Breuning, 1965, Dryopea excavatipennis Breuning, 1965, Eunidia nigroapicalis (Pic, 1925), Eunidia savioi (Pic, 1925) from Vietnam; Daxata confusa Pascoe, 1869 from the Philippines; Mynonebra opaca Fisher, 1925. from Luzon Island and Marinduque islands; Mimectatina singularis Aurivillius, 1927 from Mindanao Island and Scapexocentrus philipinus Vives, 2020 from Panay Island (the Philippines). The distributionsl range of Cleomenes dihammaphoroides Thomson, 1864 has been clarified, and two synonymies are proposed: Ametacyna holzschuchi Huedepohl, 1995 syn. nov. for Mimomorpha flavopunctata Breuning, 1980 and the genus Ametacyna Hüdepohl, 1995 syn. nov. for the genus Mimomorpha Newman, 1842.