Hypseloecus nigrobrevis sp. nov.

(Figs. 2 E, 5–6)

Diagnosis. Distinguished from any other congeners by its tiny size; almost wholly dull, dark general coloration; and both golden-brown setae and wooly, silvery setae on dorsum.

Description. Female. COLORATION AND VESTITURE: Body, including appendages, generally dull, dark brown; dorsal surface less shining, with both golden-brown, reclining setae and wooly, silvery, reclining setae.

Head dark chestnut brown. Antenna uniformly dull grayish brown, slender. Labium shiny dark brown; segment I somewhat tinged with red. Pronotum, scutellum and pleura including ostiolar peritreme dark brown as in Fig. 6. Hemelytron fuscous; membrane dark smoky brown, with pale veins. Coxae wholly fuscous as in Table 1. Legs entirely dark brown; tibial annulations invisible. Abdomen fuscous. STRUCTURE: As in generic description (see Schuh & Menard, 2011). Male. Unknown.

Measurements. ♀: Total body length 2.2−2.3; length from apex of clypeus to cuneal fracture 1.70−1.90; width of head across eyes 0.75−0.77; head height 0.51−0.53; width of vertex 0.36−0.39; lengths of antennal segments I −IV 0.20−0.21, 0.70−0.72, 0.32−0.36, 0.48−0.50; basal width of pronotum 0.96−0.98; maximum width across hemelytron 1.18−1.21; and length of metatibia 1.11−1.14.

Etymology. From Latin, nigris (= black) in combination with brevis (= small), referring to the dark, small shape of this new species; an adjective.

Biology. Unknown; adults are attracted to light.

Holotype: ♀, THAILAND: Nakhon Ratchasima: SERS, 14˚30'27”N, 101˚55'39”E, 410 m alt., light trap, 31 May 2012, T. Yasunaga (AMNH _PBI 00380243) (DOA)

Paratype. THAILAND: 1♀, same locality as for holotype, light trap, 28 Oct 2008, T. Yasunaga, K. Yamada (AMNH _PBI 00380244) (TYCN).