中国墨管蚜蝇属二新种记述（双翅目：食蚜蝇科）

DESCRIPTIONS OF TWO NEW SPECIES OF THEGENUS MESEMBRIUS FROM CHINA(DIPTERA: SYRPHIDAE )

本文记述墨管蚜蝇属Ｍｅｓｅｍｂｒｉｕｓ二新种：细叶墨管蚜蝇Ｍｅｓｅｍｂｒｉｕｓｇｒａｃｏｉｌｉｆｏｌｉｕｓｓｐ．ｎｏｖ．和长茎墨管蚜蝇Ｍ．ｌｏｎｇｉｐｅｎｉｔｕｓｓｐ．ｎｏｖ，模式标本保存于华南农业大学昆虫标本室。

In the present paper,two new species of the genus Mesembrius Rondani,M.gracilifolius sp. nov. and M. longipenditus sp. nov.,are described as new to science.All type specimens are deposited in South China Agricultural University.1 Mesembrius gracilifolius sp.nov.(Figs. 1-7)Eyes contiguous for a distance not greater than the width of the ocellar triangle. Facewith a broad median brown black strip.Thorax black with four pale vittae.Middle femurblack, anterior 1/2 ventrally with black spines, middle tibia yellow,with long black hairson anteroir 1/2 ventrally and with 4-6 spines at the apex (Fig.4). Abdomen yellow withblack bands(Fig.5).Superoir lobe of aedeagus fine(Fig.7). Lateral lobe of aedeagus large.This species is allied to Mesemhaus bengalensis (Wiedemann), but with distinguishedcharacters as follow:1)the lst tergum black, with yellow bands on sides; 2) without mammiform projection at ventral base of middle femur.The male genitalia apparentlly differfrom that of M. bengalensis(Wiedem.).Holotype ,Fuzhou (26°10'N, 119°25'E ) of Fujian Province, May 26, 1964, LIZhao-hua leg..Paratype 1, Dinghushan of Guangdong Province, March,1964, LI Xue-zhi leg.;1, Nanning of Guangxi Autonomus Region, June, 1985, TAN Yi leg.;1 ,Nanning ofGuangxi Autonomus Region, March 14, 1987, WANG Zhu-yin leg.; 2, Dinghushanof Guangdong Province, Sept. 26, 1981, Jiang Nan and Huang Jin-xin leg.; 1, Haifengof Guangdong Province, July 1, 1982, LIU Tan-jin leg..2 Mesembrius longipenitus sp. nov. (Figs. 8-15)Face without median strips. Soutellum yellow, black at base, wholly yellow pubescent.Middle tibia with 3 black setae at apex. Epandrium with long lateral arm. Apodeme ofaedeagus long.This species is closely allied to M. flaviceps (Matsumura), but can be distinguishedfrom the latter by the following characters: 1) the '工' formed band of Znd tergum whollyblack; 2) lateral arm of epandrium not surpass the hypandrium; 3) the form of aedeagalapodeme and the lateral lobes of aedeagus are also different.Holotype , Liuan (31. 75°N, 116.50'E), Anhui Province,July 26, 1965, ZHANGWei-jie leg..