Four new species and ten new records of Ecnomus McLachlan (Trichoptera: Ecnomidae) from southern China

Four new species of the genus Ecnomus McLachlan, 1864 from China are described: E. jianfengensis Zheng & Sun, sp. nov. (Hainan), E. zhengyangorum Zheng & Sun, sp. nov. (Hainan), E. changhuaensis Zheng & Sun, sp. nov. (Hainan), and E. deformitas Zheng & Sun, sp. nov. (Yunnan). Detailed morphological descriptions, diagnostic characters, and illustrations are provided for each new species. Additionally, ten species are newly recorded from China: E. alkestis Malicky & Chantaramon