Hypseloecus castaneus sp. nov.

(Figs. 2 B–C, 3, 5–7)

Diagnosis. Distinguished from other congeners by its brown to castaneous body often tinged with red; broad head, with reddish striae on frons (Fig. 5); and color pattern of coxae (Fig. 6, Table 1).

Description. Male. COLORATION AND VESTITURE: Body generally pale brown, often partly tinged with orange-red or maroon; dorsal surface brown to castaneous, with densely distributed, reclining scalelike setae. Head pale brown, rather shining, with red striae on frons; clypeus with sanguineous stripes laterally. Antenna uniformly pale or yellowish brown; segment I sometimes tinged with red. Labium shiny pale brown. Pronotum usually chestnut brown; pleura as in Fig. 6; ostiolar peritreme yellowish white. Hemelytron brown or chestnut brown; membrane grayish brown, with pale veins and irregular, pale, semitransparent portion at middle. Coxae as in Table 1. Leg whitish or yellowish brown; each femur mottled with red-orange maculae; all tibiae with obscure, reddish brown annulations. Abdomen pale to reddish brown. STRUCTURE: As in generic description (see Schuh & Menard, 2011). Genitalia (Fig. 3): Endosoma J-shaped, with a median process. Female. Similar coloration and structure to male.

Measurements. ♂/♀: Total body length 2.2−2.4/ 2.3−3.1; length from apex of clypeus to cuneal fracture 1.74−2.00/ 1.90−2.30; width of head across eyes 0.91−1.05/ 0.94−1.08; head height 0.60−0.64/ 0.62−0.64; width of vertex 0.49−0.51/ 0.51−0.60; lengths of antennal segments I −IV 0.19−0.24, 0.73−0.90, 0.36−0.39, 0.38−0.50/ 0.20−0.24, 0.72−0.96, 0.39−0.44, 0.42−0.54; basal width of pronotum 1.08−1.19/ 1.08−1.31; maximum width across hemelytron 1.21−1.44/ 1.33−1.59; and length of metatibia 1.20−1.42/ 1.20−1.56.

Etymology. From Latin, castaneus (= chestnut or castaneous brown), referring to the general coloration of this new species.

Biology. Confirmed host is Scurrula species growing from Homonoia riparia Lour.

Holotype: ♂, THAILAND: Nakhon Nayok: Sarika near Sarika Waterfall, 14˚18'32”N 101˚15'20”E ~ 14˚18'09”N 101˚15'38”E, on Scurrula sp., 22 Mar 2010, T. Yasunaga, K. Yamada (AMNH _PBI 00380215) (DOA).

Paratypes. THAILAND: Nakhon Nayok: 17♂ 6♀, same data as for holotype, except for date 31 May 2012 (AMNH _PBI 00380216–00380225) (AMNH, TYCN); 14♂ 23♀, same data without USI label (TYCN). Nakhon Ratchasima: 1♀, SERS, 14˚30'27”N, 101˚55'39”E, 410 m alt., light trap, 16 Sep 2008, T. Yasunaga (00380226) (TYCN); 1♀, same locality,, light trap, 28 Oct 2008, T. Yasunaga, K. Yamada (00380227) (TYCN); 1♀, same locality, light trap, 29−31 May 2012, T. Yasunaga (00380228) (TYCN); 1♂ 3♀, light trap, 21 Mar 2014, T. Yasunaga, K. Yamada (AMNH _PBI 00380229–00380231) (TYCN). Chaiyaphum: 2♀, Chulabhom Dam, 16˚32−33'N, 101˚38−39'E, 760−780 m, 16−18 Apr 2013, T. Yasunaga, A. Wolski (00380232) (TYCN).

Coloration of antenna Ostiolar Coloration of lateral sides of coxae Labial apex

segmet I segment II peritreme procoxa mesocoxa metacoxa