Abstract
Three new species of Eotrechus Kirkaldy were collected from vertical rock surfaces of waterfalls in northern and central Thailand. Eotrechus siamensis sp. n. was collected at Doi Inthanon and Doi Suthep National Parks in Chiang Mai Province, northern Thailand. Eotrechus elongatus sp. n. and Eotrechus romglao sp. n. were collected from waterfalls in Phu Hin Rongkla National Park in Phetchabun Province, central Thailand. These new species are described and illustrated here as is the female of Eotrechus petraeus Andersen. In addition, Eotrechus kalidasa Kirkaldy was discovered for the first time in Thailand. Finally, diagnostic and distributional information of all known species of this genus in Thailand are given.References
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