Key to the species of Eotrechinae (Hemiptera: Heteroptera: Gerridae) of Thailand and review of the fauna of the Phetchabun Mountain Range Author Nakthong, La-Au Author Vitheepradit, Akekawat Author Sites, Robert W. text Zootaxa 2014 3860 1 47 63 journal article 36797 10.11646/zootaxa.3860.1.2 a26eaf5f-4eba-45ad-8806-dd7288d78493 1175-5326 287060 B9713C6D-BC3B-4EF2-8495-8BDCD535A80D Eotrechus kalidasa Kirkaldy Fig. 42 Eotrechus kalidasa Kirkaldy 1902 : Entomologist 137. Eotrechus kalidasa: Andersen, 1982b : Steenstrupia 8–9 (supplemental description). Eotrechus kalidasa : Tran and Zettel, 2006b : Zootaxa 46–48 (supplemental description). Diagnosis. Males of this species can be recognized by the mesosternum less than twice the length of the metasternum and a pair of elongate posterolateral projections of the pygophore ( Fig. 42 ), whereas those of E. elongatus have the pygophore without posterolateral projections and those of E. romglao have a pair of small knoblike lateral projections. Discussion. This species has been reported from India , Myanmar , and Thailand ( Andersen 1982b , Vitheepradit & Sites 2007 ). The Thai record was based on a single winged male caught in a malaise trap on a trail near a small creek in Phu Hin Rongkla NP ( Vitheepradit & Sites 2007 ). We have attempted to collect this species several times from 2010 to 2012 at that locality and adjacent areas, including a nearby creek. However, no additional specimens were collected. So far, in Thailand this species has not been collected anywhere other than in Phu Hin Rongkla NP in Loei Province. Material examined. THAILAND : Phitsanulok Province : Phu Hin Rongkla NP, Man Daeng Noi at trail, 16°57'N 101°03'E , 1600 m , 21 Sept – 21 Oct 2002 , coll: CMU team (1 winged male).