中国小蚜蝇属(Paragus Latreille,1804)二新种记述

Descriptions of two new species of Paragus Latreille, 1804 from China(Diptera:Syrphidae)

目的研究秦巴山区昆虫生物多样性。方法2001—2002年对秦巴山区食蚜蝇科昆虫进行野外调查,对标本进行整理和鉴定。结果发现中国小蚜蝇属(ParagusLatreille,1804)二新种。结论汉中小蚜蝇,新种Paragushanzhongensissp.nov,本种在形态上极似双色小蚜蝇Paragusbi color,但雄性背针突内侧下缘呈三角扩大,阳基导突约为第九腹板中央长度之半,端部向上折迭呈折扇状,阳基导突侧面具三角状侧翼,侧翼外侧基部有一齿突,阳茎侧突弯钩状,顶尖。九池小蚜蝇,新种Paragusjiuchiensissp.nov,本种近似汉中小蚜蝇,新种Paragushanzhongensissp.nov,但雄性背针突侧面观下缘具梯形突出,阳基导突侧翼基部内、外侧近边缘处各有一向上的齿突,阳茎侧叶背缘具齿。

Aim Studies on the insecta biodiversities of Qinling-Bashan Mountains Area. Methods During 2001-2002 investigations on Syrphidae of Qinling-Bashan Mountains Area were made, and specimens were checked up and identified.Results Two new species of Paragus Latreille, 1804 from China were identified.Conclusion (1) Paragus hanzhongensis sp. nov. (Fig.1). This new species is very similar to Paragus bicolor (Fabricius, 1794) in appearance, but differs from it with the following characteristies: lower margin of surstylus of male terminalia with triangular prominence in lateral view, aedeagal guide about the half of the middle of hypandrium in length, its end enfolded upwards in the shape of folding fan. Aedeagal guide with triangular side wing laterally, its outer side of basal portion with a denticular prominence. Paramere is in the shape of cured hook with the apex sharp. Holotype ♂, allotype ♀, VII-8-2002, Hanzhong, Shaanxi Province, China, collected by Huo Keke; Paratypes 6♂♂, VII-8-2002, Hanzhong, Shaanxi Province, China; 1♂, IX-5-2002, Hanzhong, Shaanxi Province, China; 2♂♂1♀, XIV-8-2002, Hanzhong, Shaanxi Province, China, collected by Huo Keke. Type specimens are kept in Bio-resources Key Laboratory of Shaanxi Province, Department of Biology, Shaanxi University of Technology, Hanzhong, Shaanxi Province, China. (2) Paragus jiuchiensis sp. nov. (Fig.2). Allied to Paragus hanzhongensis sp. nov., but new species bears a trapeziform prominence at lower margin of surstylus of male terminalia in lateral view. The outer and the inner sides of side wing with a upward denticle almost to its margins at the basal portion respectively. The dorsal margin of lateral lobe of aedeagus bears 4 denticles. Holotype ♂, allotype ♀, IV-8-2002, Jiuchi, Yangxian county, Shaanxi Province, China, collected by Huo Keke. Type specimens are kept in Institute of Zoology, Shaanxi Normal University, Xi′an, Shaanxi Province, China.