中国斑栉叶蜂属研究及二新种(膜翅目,叶蜂科)

ON THE GENUS BRYKELLA MALAISE(HYMENOPTERA,TENTHREDINIDAE) WITH DESCRIPTIONS OF TWO NEW SPECIES FROM CHINA

记述中国叶蜂科、蔺叶蜂亚科、斑栉叶蜂属2新种,白股斑栉叶蜂Brykella albofemorata sp.nov.和大斑栉叶蜂B.magna sp.nov.。提供了栉爪叶蜂族Anisoarthrini分属检索表,描述了斑栉叶蜂属属征,编制了斑栉叶蜂属分种检索表。

Two new species of Brykella Malaise from China are described.Keys to genera of the tribe Anisoarthrini and to known species of Brykella are provided.T he type specimens are kept in the Insect Collection of Central South University of Forestry and T echnology,Changsha,Hunan Province,China（CSCS） and Institute of Zoology,the Chinese Academy of Sciences（IZCS）.1 Brykella albofemorata sp.nov.（Figs 1-11） Body length of female 10 mm,male unknown.T his new species is similar to B.tamdaoensis Haris,2008 from Vietnam,but differs from the latter in each femur entirely white;the first abdominal tergite largely yellow white with only lateral sides reddish brown;the abdominal sternites dark reddish brown;the smoky macula in forewing much darker in anterior half;the fourth tooth of claw short and obtuse at apex,not differentiated completely from the basal lobe.Holotype ♀,Guangxi,W uming,M t.Daming,Longteng Hotel（23°29’N,108°25’E;alt.1368 m）,23 M ay 2011,LIU Yan-Xia,XUE Jun-Zhe（CSCS）.Paratypes：1♀,same data as holotype;1♀,Yunnan,Xishuangbanna,M engsong,alt.1 600 m,24 Apr.1958,PU Fu-Ji（IZCS）.Etymology.T his new species is named after its white femora.2 Brykella magna sp.nov.（Figs 12-21） Body length of female 13 mm,male unknown.T his new species is similar to B.brevis W ei,2003 from Fujian but differs from the latter in body length 13 mm;the cell 2Rs on forewing distinctly longer than cells 1R1 ＋ 1Rs together;the hind basitarsus as long as following 4 tarsomeres together;the setae on lateral sides of sheath in dorsal view extending more outwards with an angle at about 90°-100°;the middle trochanter black brown;the second tooth of claw longer than the first one,the fourth tooth distinct and acute at apex;the petiole of hind anal cell longer than half length of the anal cell and about 1.8 times length of vein cu-a.Holotype ♀,Guangxi,W uming,M t.Daming,Liangjiang T own（23°54’N,108°35’E;alt.200 m）,26 M ay 2011,LIU Yan-Xia,XUE Jun-Zhe.Paratypes：1 ♀,same data as holotype;1 ♀,Guangxi,Fangchenggang,alt.250 m,7 Apr.2002,CAI Ping（CSCS）.Etymology.T he species is named after its large body size.