Hybos phahompokensis, PLANT, 2013

PLANT, ADRIAN R., 2013, <p class = " HeadingRunIn " align = " left "> <strong> The genus <em> Hybos </ em> Meigen (Diptera: Empidoidea: Hybotidae) in Thailand </ strong> </ p>, Zootaxa 3690 (1), pp. 1-98 : 52

Hybos phahompokensis sp. nov.

( Figs 126–130, 234, 238, 266)

Type material. HOLOTYPE ♂: THAILAND, Chiang Mai Province, Doi Phahompok National Park, Kiewlom 1/ Montane Forest , 20°3.549'N 99°8.552'E, 2174 m, 21–28.iv.2008, Malaise trap, K. Seesom [ T6075 ] ( QSBG) . PARATYPES: 6♂, 1♀, same data as holotype, 21–28.iv.2008 and 28.iv.-7.v.2008 ; 1♂, 1♀, Doi Phahompok National Park , Doi Phaluang, 20°1.06'N 99°9.581'E, 1449 m, 28.iv.-7.v.2008 ( QSBG and NMWC) .

Etymology. Named after the type locality, Doi Phahompok.

Diagnosis. A black legged species with entirely pale setae on coxae and stylus micropilose on basal 0.8. The mid tibia has 1 dorsal and 1 ventral seta very long; the hind femur is slightly inflated in the male and hardly less so in the female. The hind tibia rather slender in both sexes, only slightly swollen apically. Distinguished from H. zhejiangensis Yang & Yang, 1995 and H. shamshevi sp. nov. primarily by differences of male and female terminalia.

Description. Male: body length 4.5–5.0 mm. Almost identical with H. zhejiangensis in both sexes. Male F 3 ( Fig. 234) and T 3 ( Fig. 238) rather slender. Female F 3 hardly narrower than male, ventral spines narrowly biserial comprising ~6 av bristles behind which are ~13 smaller setae. Male terminalia ( Figs 126–129) with all bristles dark. Left epandrial lamella with concave inner margin, moderately long setae distally. Left surstylus ( Fig. 129) with long curving dorsal process and much shorter triangular process below. Right epandrial lamella with inner margin slightly protuberant. Right surstylus moderately long, somewhat incurved, narrow and bluntly pointed viewed from above ( Fig. 126), much broader viewed from the side ( Fig. 128), with internally directed pointed triangular process basally. Hypandrium ( Fig. 127) elongate, vaguely narrowed subapically, with short black triangular and more rounded, yellowish, subapical processes. Female terminalia ( Fig. 130). Tergite 8 with posterior margin deeply concave. Sternite 8 weakly sclerotized apart from small lateral areas proximally and median area which is broader apically and interrupted near base.

Comments. This species is very similar to H. zhejiangensis , H. shamshevi sp. nov. and especially H. inthanonensis sp. nov. but can be confidently separated in both sexes by the form of the terminalia. At present it is known only from specimens collected in April at 2,174 m and 1,449 m on Doi Phahompok (Daen Lao Range) in the far north of Thailand ( Fig. 266).