was described by Pan et al
. in 2010 from Xizang Autonomous Region with the male unknown. The specimens of male and female were collected from Shanxi province in 2015. This paper supplemented the descriptions and illustrations of the male. The examined specimens were deposited at Shaanxi Sci-Tech University, Hanzhong city, Shaanxi province, China. The appearance D. xizangensis
Pan, Wang et
Huo, 2010 was similar to Dasysyrphus postclaviger
Moucha, 1962), however, the former had dark-brown stigma and yellow hind tarsi, while the latter had yellow stigma and black hind tarsi. The eyes of D. xizangensis
were covered with densely yellowish brown hairs. Face yellow with black median stripe not extending to base of antennae. Mesonotum was covered with yellow long pile, shining black with dark gray median stripe extending posteriorly almost to the end of mesonotum. Scutellum yellow, mostly black pilose. Legs were brownish yellow, but dark black on all of coxae, trochanters and basal portions of femora. Wing stigma was blackish brown. Abdomen shining black, 3 pairs of yellow spots on abdomen were not extended to margins. The first pair of spots were obliquely located in the middle of tergite 2, with inner ends nearly approaching anterior margin of the tergite. The second and third pairs of spots were located in basal half of tergites and with expanded outer ends triangularly. Tergites 4 and 5 were narrowly yellow on posterior margins. Male terminalia was similar to that of D. postclaviger
, but differed from the latter by distal portion of aedeagus inflated medially (compared with figures 281~284 of Hippa, 1968, P. 73).
2016,35(6): 910-912 收稿日期：2016-08-01
霍科科, 任国栋, 郑哲民. 2007. 秦巴山区蚜蝇区系分类(昆虫纲:双翅目)[M]. 北京:中国农业科学技术出版社.
潘朝晖, 王保海, 霍科科. 2010. 中国毛蚜蝇属1新种记述(双翅目:食蚜蝇科)[J]. 东北林业大学学报, 38(11):133-134.
Hippa H. 1968. A generic revision of the genus Syrphus and allied genera (Diptera, Syrphidae) in the Palearctic region, with description of the male genitalia[J]. Acta Entomologica Fennica, 25:7-94.