Geranomyia nigra Zhang, Zhang & Yang, 2016, sp. nov.

Geranomyia nigra sp. nov.

Figs. 45–51

Diagnosis. Prescutum black. Pleuron dark brownish black. Wing with only oval dark brown stigma; Sc1 ending about opposite 2/3 of Rs, basal section of CuA1 a short distance beyond fork of M. Lobe of gonostylus with rostral prolongation small, middle with two relatively long spines arising from a small tubercle.

Description. Male. Body length 6.8–7.0 mm, wing length 6.6–7.0 mm, mouthparts length 2.2 mm.

Head (Fig. 46). Black. Setae on head black. Antenna length 1.0 mm, black. Scape cylindrical. Pedicel nearly globose. Flagellomeres oval, terminal flagellomere with tip cuspate. Mouthparts black with black setae.

Thorax. Pronotum and prescutum black. Scutum black with middle area paler. Scutellum and mediotergite black (Fig. 47). Pleuron (Fig. 45) dark brownish black. Setae on thorax white. Fore and middle coxae brownish black, hind coxa yellow; trochanters brownish yellow; femora brownish black with bases yellow; tibiae and tarsi brownish black. Setae on legs brownish black. Wing (Fig. 49) tinged brown with only oval dark brown stigma. Veins brownish black. Venation: Sc long, Sc1 ending about opposite 2/3 of Rs, Sc2 at its tip; basal section of CuA1 a short distance beyond fork of M. Haltere length 1.0 mm, white with knob brownish black.

Abdomen (Fig. 45). Tergites brownish black. Sternites brown with basal segments paler. Setae on abdomen white.

Hypopygium (Figs. 50–51). Posterior margin of tergite nine slightly emarginate. Gonocoxite with a relatively small and simple ventromesal lobe. Clasper of gonostylus arched at 1/2 length, abruptly narrowed to apical spine. Lobe of gonostylus large; rostral prolongation small, middle with two relatively long spines arising from a small tubercle. Paramere with mesal-apical lobe relatively stout and short, tip acute.

Female. Body length 6.5–6.7 mm, wing length 6.8–7.0 mm, mouthparts length 2.3–2.4 mm. Similar to male. Cercus brownish yellow. Hypogynial valve dark brownish yellow. Tip of hypogynial valve near 3/4 of cercus (Fig. 48).

Type material. Holotype male (CAU), China: Taiwan, Taoyuan, Fuxing (24°48'36"N, 121°20'55"E, 420 m), 2013. VI.10, Wenliang Li (light trap). Paratypes: 1 male 1 female (CAU), same data as holotype. 2 males 4 females (CAU), China: Zhejiang, Pinghu, Mt. Jiulong (30°35'56"N, 121°06'36"E, 30 m), 2013. VII.3, Xiao Zhang (light trap). 3 males 3 females (CAU), China: Yunnan, Lvchun, Mt. Huanglian, Qimaba (22°48'36"N, 102°14'24"E, 1012 m), 2013. VII.25, Yunlan Jiang (light trap). 1 male 5 females (CAU), China: Sichuan, Mianyang, Pingwu, Laohegou (32°20'48"N, 104°40'59"E, 770 m), 2012. VII.20, Yingying Wang & Ya'nan Lv (light trap). 2 males 2 females (CAU), China: Guangxi, Baise, Mt. Cenwanglao, Dalongping (24°29'12"N, 106°20'55"E, 1300 m), 2012. VII.28–29, Feiyang Liang & Yunlan Jiang. 1 male (CAU), China: Gansu, Longnan, Bikou, Bifenggou (32°44'26"N, 105°14'54"E, 655 m), 2012. VII.29, Zehui Kang.

Distribution. China (Gansu, Sichuan, Yunnan, Zhejiang, Guangxi, Taiwan).

Etymology. The specific name (from Latin niger (adj., meaning"black”)) refers to the body color almost entirely black.

Remarks. This new species is somewhat similar to G. contrita (Alexander, 1937) and G. multicolor (Alexander, 1966) in having the similar clouds and venation of wing. It can be easily distinguished from G. contrita by the prescutum without stripe (Fig. 47), and the tip of hypogynial valve in female near 3/4 of cercus (Fig. 48), whereas in G. contrita, prescutum has three confluent dark brown stripes (Alexander 1937a), and the tip of hypogynial valve is near 1/2 of cercus. Differing from G. multicolor, this new species has large lobe of gonostylus and clasper of gonostylus with the acute tip straight (Figs. 50–51). In G. multicolor, the lobe of gonostylus is small and the acute tip of clasper of gonostylus is upcurved (Alexander 1966).