Dialineura henanensis Yang, 1999

Liu, Si-Pei & Yang, Ding, 2012, Revision of the Chinese species of Dialineura Rondani, 1856 (Diptera, Therevidae, Therevinae), ZooKeys 235, pp. 1-22 : 7-10

Dialineura henanensis Yang, 1999 Figs 234273

Dialineura henanensis Yang, 1999: 186. Type locality: Henan, China (Holotype deposited in Entomology Museum of China Agricultural University, Beijing).

Diagnosis.

Male mesonotum with 3 wide grey vittae, separated by 2 narrow pale yellow stripes, the central vitta with a narrow brown stripe in the middle; female mesonotum with 3 wide black vittae, separated by 2 narrow grey stripes, the central vitta with a narrow grey stripe in the middle. Pterostigma of wing pale yellow. Halter knob pale yellow. Male epandrium wide basally then suddenly narrow after middle line and with a triangular medial invagination apically; gonocoxite relatively wide apically; dorsal apodeme of aedeagus 1/2 as long as ventral apodeme; distiphallus recurved and S-shaped.

Redescription.

Male. Body length 7.3-8.5 mm, wing length 6.6-7.1 mm.

Other characters as described for Dialineura elongata sp. n., with following exceptions: Antennal ratio: 5.5: 1.0: 4.5: 0.5. Proboscis black with short white pile; palpus black with white pile. Mesonotum (Fig. 24) with 3 wide grey vittae, separated by 2 narrow pale yellow stripes, the central vitta with a narrow brown stripe in the middle. Notum with sparse short white pile mixed with black pile. All femora (Fig. 26) black with yellow tips. Fore coxa with a 1, av 1; mid coxa with a 3; hind coxa with a 2-3, d 1. Fore and mid femora without any prominent setae; hind femur with av 6, pv 2-3. Fore tibia with ad 3-4, pd 3, pv 3, apically with 4 setae; mid tibia with ad 3, pd 3, av 3, pv 4, apically with 6 setae; hind tibia with ad 9, pd 6-8, av 8, pv 4-5, apically with 8 setae. Pterostigma of wing (Fig. 25) pale yellow; veins yellow. Halter stalk brownish yellow basally and dark brown apically; knob pale yellow. Anterior margins of tergites 2-3 of abdomen with very thin pubescence so that ground color is visible. Terminalia with only white pile. Male genitalia: Epandrium (Fig. 30) much elongated, 1.3 times longer than wide, apically narrowed with a triangular medial invagination. Subepandrial sclerite triangular, nearly 2 times longer than cercus. Dorsal apodeme of aedeagus (Figs 32-34) 1/2 as long as ventral apodeme.

Female. Body length 9.3-10.1 mm, wing length 7.0-7.9 mm.

Most characters of female are similar to the male, with following exceptions: Frons and antenna with dense brownish yellow pubescence over black ground color. Frons (Fig. 35) wide with 2 rows black setae, the narrowest point of frons 3-5 times wider than anterior ocellus. Antennal setae shorter than male; antennal ratio: 4.5: 1.0: 4.1: 0.6. Proboscis with short brown pile. Mesonotum (Fig. 36) with 3 wide black vittae, separated by 2 narrow grey stripes, the central vitta with a narrow grey stripe in the middle. Notum with more pile than male. Fore coxa with a 1, av 1; mid coxa with a 3; hind coxa with a 3, d 1. Fore and mid femora without any prominent setae; hind femur with av 5-7, pv 4-5. Fore tibia with ad 3, pd 3, pv 2-4, apically with 6 setae; mid tibia with ad 3, pd 3, av 2, pv 4, apically with 6-8 setae; hind tibia with ad 7-9, pd 10, av 8, pv 5-7, apically with 6 setae. Most anterior margins of tergites of abdomen with very thin pubescence so that ground color is visible. White short setae mixed with brown short setae on abdomen, except tergite 1 with some white pile. Femalegenitalia: Tergite 8 (Fig. 39) quadrate in dorsal view; sternite 8 (Fig. 40) long trapezoidal in ventral view with an incision apically. Cercus (Fig. 42) semicircular. Subepandrial sclerite (Fig. 40) bell-shaped. Furca (Fig. 41) 2.2 times longer than wide. Accessory glands with separated ducts. Spermathecal sac rather large and spherical; two spermathecae, spherical.

Materials.

1 male, CHINA: Beijing, Shangfang Mountain (39°39'N, 115°49'E), 22. V. 1976, Chi-Kun Yang; 4 male, 14 female, CHINA: Yunnan, Xishuangbanna, Jinghong (21°58'N, 100°48'E, 300m), 27. IV. 2002, Wen-Quan Zhen; 2 male, CHINA: Henan, Neixiang, Baotianman (33°31'N, 111°52'E), 20. V. 2006, Wei-Hai Li; 3 male, 3 female, CHINA: Beijing, Mentougou (39°56'N, 116°06'E), 30. V. 2008, Tao Wang; 1 male, CHINA: Shaanxi, Zhouzhi, Houzhenzi (33°53'N, 108°02'E), 5. V. 2009, Mao-Ling Sheng; 1 male, 1 female, CHINA: Yanqing, Song Mountain (40°29'N, 115°49'E; 780 m), 23. V. 2009, Wei-Na Cui & Jin-Jing Wang; 10 male, 22 female, CHINA: Beijing, Xiaolongmen Woodland (39°57'N, 115°26'E), 24. V. 2009, Li Shi, Hui Yu & Liang Liang; 52 male, 76 female, CHINA: Beijing, Xiaolongmen Woodland (39°57'N, 115°26'E; 1 177-1 430 m), 25. V. 2009, Li Shi, Hui Yu & Liang Liang; 16 male, 17 female, CHINA: Beijing, Ling Mountain, Ancient Road (39°59'N, 115°29'E; 1 022-1 144 m); Li Shi & Liang Liang; 1 female, CHINA: Beijing, Xiaolongmen (39°57'N, 115°26'E), 21. V. 2010, Tao Li; 1 male, CHINA: Inner Mongolia, Helan Mountain, Gulaben, Luanchaigou (39°00'N, 105°50'E), 10. VIII. 2010, Li-Hua Wang.

Distribution.

Palaearctic region: China (Henan, Beijing, Shaanxi, Inner Mongolia); Oriental region: China (Henan, Yunnan) (Fig. 73). This is biogeographically part of North China Region, Mongolia-Xinjiang Region and South China Region ( Zhang 1999).

Remarks.

Yang (1999) first described Dialineura henanensis from Henan, China and gave the figures of male genitalia, but the female was unknown. We found large amount of Dialineura henanensis specimens from other provinces (i.e. Shaanxi, Inner Mongolia, Yunnan) and city (i.e. Beijing) of China, therefore we infer that this species is widespread in China. We redescribe this species and give figures of both male and female genitalia.