Minettia (Plesiominettia) nujiangensis sp. nov.

(Figs. 71–80)

Diagnosis. Frons with two brownish yellow longitudinal stripes along fronto-orbital rows extending to ocellar triangle; mesonotum with a pair of strong prescutellar setae, closer to scutoscutellar suture than third post-sutural dorsocentral setae; haltere with knob blackish brown; abdominal tergites with narrow yellow posterior margin.

Description. MALE. Body length 3.9–4.9 mm, wing length 5.8–7.5 mm. FEMALE. Body length 3.5–5.0 mm, wing length 4.8–6.3 mm.

Head (Fig. 71) brownish yellow, with grayish white pruinescence. Face blackish brown, parafacial brownish yellow except outer margin yellow. Frons wider than long and parallel-sided, with two brownish yellow longitudinal stripes along fronto-orbital rows extending to ocellar triangle; ocellar triangle black, ocellar setae developed, almost 2 times longer than anterior fronto-orbital setae, anterior fronto-orbital setae reclinate, shorter than posterior frontoorbital setae. Gena about 1/6 height of eye. Antenna yellow, the tip and dorsal margin of first flagellomere brown, 1.5 times longer than high; arista blackish brown except paler basally, pubescent with longest setulae shorter than 1/2 height of first flagellomere. Proboscis blackish brown, with white and black setulae; palpus black with black setulae.

Thorax (Fig. 74) black, with grayish white pruinescence. 0+3 dorsocentral setae; acrostichal setulae in six rows, with a pair of strong acrostichal setulae between first post-sutural dorsocentral setae and second post-sutural dorsocentral setae, almost as long as first post-sutural dorsocentral setae; a pair of strong prescutellar setae, longer than first post-sutural dorsocentral setae, and closer to scutoscutellar suture than third post-sutural dorsocentral setae. One anepisternal seta, two katepisternal setae. Legs brown, tarsomeres 1–3 yellow. Fore femur with eight posterior dorsal setae, six posterior setae and eight posterior ventral setae; fore tibia with one dorsal preapical seta and one short apical ventral seta. Mid femur with six anterior setae; mid tibia with one strong dorsal preapical seta and three apical ventral setae. Hind femur with one preapical anterior dorsal seta; hind tibia with one dorsal preapical seta. Wing (Fig. 72) hyaline and yellow at base, wing veins brown, subcostal cell hyaline; costa with 2nd (between R 1 and R 2+3), 3rd (between R 2+3 and R 4+5), and 4th (between R and M 1) sections in proportion of 14.7: 4.1: 2.9; r-m beyond middle of discal cell; ultimate and penultimate sections of M 1 in proportion of 10.7: 5.5; ultimate section of CuA 1 about 1/4 of penultimate. Haltere yellow, except knob blackish brown.

4+5

Abdomen (Fig. 75) black, with grayish white pruinescence, tergites with narrow yellow posterior margin. Male genitalia (Figs. 76–80): syntergosternite semicircular. Epandrium nearly rectangle, tip of surstylus slightly curved forward in lateral view and curved outward in posterior view; hypandrium thin, with a pair of small inner processes. Phallapodeme shorter than phallus; phallus consisting of one ventral sclerite and a pair of dorsal sclerites, with a pair of bifurcated and curved forward claw processes.

Type material. Holotype (CAUC): ♁, CHINA, Yunnan Province: Nujiang Liuku Yaojiaping, 2006. V. 25, Yajun Zhu . Paratypes (CAUC): 1 ♁, data same as holotype; 4 ♁♁, 3♀♀, CHINA, Yunnan Province: Nujiang Liuku Yaojiaping, 2006. V. 25, Xingyue Liu; 1 ♁, 1 ♀, CHINA, Yunnan Province: Baoshan Tengchong Zizhicun, 2007. V. 31, Xingyue Liu; 1 ♀, CHINA, Yunnan Province: Baoshan Tengchong Zizhicun, 2007. V. 31, Yanlei Li; 1 ♁, CHINA, Yunnan Province: Baoshan Baihualing hot spring, 2006. V. 23, Xingyue Liu .

Distribution. China (Yunnan)

Remarks. The new species is somewhat similar to Minettia (Plesiominettia) zhejiangica Shi & Yang, but it can be separated from the latter in the body length 3.5–5.0 mm; frons with two brownish yellow stripes along frontoorbital rows extending to ocellar triangle; acrostichal setulae in six rows; haltere with knob blackish brown; tergites with narrow yellow posterior margin. In Minettia (Plesiominettia) zhejiangica Shi & Yang, body length 5.6–6.2 mm; frons without brownish yellow longitudinal stripe; acrostichal setulae in eight rows; haltere yellow; abdominal tergites black.

Etymology. The specific epithet is named for holotype locality in Yunnan, Nujiang.