Amemboa (Amemboa) speciosa Polhemus and Andersen Figs. 19, 33 Amemboa (Amemboa) speciosa Polhemus and Andersen 1984: Steenstrupia 10: 94–95. Diagnosis. Males of A. speciosa have the pygophore with a narrowly-rounded tip (Fig. 33). Further, the male profemur has three hair patches (Fig. 19), whereas A. javanica has a single hair patch and A. brevifasciata, A. cristata, and A. riparia each have two hair patches. Males of A. speciosa have the proximal profemoral hair patch larger than the other patches, whereas A. aquafrigida has the proximal hair patch smaller than the other patches. Discussion. Amemboa speciosa has been recorded only from China, Laos, Thailand, and Vietnam (Polhemus & Andersen 1984, Zettel et al. 2007). In Thailand, this species has been collected from Chaiyaphum, Kalasin, Mukdahan, Phetchabun, and Sakon Nakhon provinces (Zettel & Chen 1997, Vitheepradit 2000). In the Phetchabun Mountains, this species was collected mainly from the margins of streams and rock pools. It was collected with A. cristata at the margin of a stream from Heaw Sai Waterfall in Chaiyaphum Province. Material examined. THAILAND: Chaiyaphum Province: Tad Tone NP, Tad Ton Waterfall, 15°59'N 102°02'E, 266 m, 13-XI-2012, KU team, C-217 (2 winged males, 1 wingless male, 6 wingless females); Tad Tone NP, Tad Fha Waterfall, 15°56'N 102°05'E, 257 m, 13-XI-2012, KU team, C-218 (11 wingless males, 1 winged female, 25 wingless females); Phetchabun Province: Nam Nao NP, Haew Sai Waterfall, 16°40'N 40°34'E, 428 m, 2-II-2012, KU team, C-25 (7 winged males, 3 wingless males, 3 winged females, 1 wingless female); same locality, 20-XII-2012, KU team, C-234 (2 winged males, 1 wingless male, 2 wingless females); Khao Kho NP, Lam Nam Khek, 16°34'N 100°58'E, 760 m, 20-VIII-2012, KU team, C-178, (52 wingless males, 61 wingless females); Nam Nao NP, stream behind visitor center, 16°44'N 101°34'E, 853 m, 20-XII-2012, KU team, C-236 (7 wingless males, 2 wingless females); Nam Nao NP, Sum Ma Cow, 16°41'N 101°40'E, 562 m, 20-XII-2012, KU team, C-238 (1 winged male, 2 wingless males, 1 wingless female); Phitsanulok Province: Thung Salaeng Luang NP, Huai Tub Dah Mi, 16°50'N 101°51'E, 397 m, 13-V-2004, A. Vitheepradit and T. Prommi, L-683 (1 wingless male); Phu Hin Lung Kla NP, Pha Lad Waterfall, 17°01'N 100°56'E, 283 m, 19-I-2012, KU team, C-102 (1 wingless male, 6 wingless females).

Published as part of Nakthong, La-Au, Vitheepradit, Akekawat & Sites, Robert W., 2014, Key to the species of Eotrechinae (Hemiptera: Heteroptera: Gerridae) of Thailand and review of the fauna of the Phetchabun Mountain Range, pp. 47-63 in Zootaxa 3860 (1) on page 57, DOI: 10.11646/zootaxa.3860.1.2, http://zenodo.org/record/287060