云南沟姬蜂亚科一新属二新种(膜翅目:姬蜂科)

A NEW GENUS AND TWO NEW SPECIES OF GELINAE (HYMENOPTERA: ICHNEUMONIDAE) FROM YUNNAN, CHINA

报道了沟姬蜂亚科Ｇｅｌｉｎａｅ，胡姬蜂亚族Ｓｐｈｅｃｏｐｈａｇｉｎａ一新属：扁角姬蜂属Ｌｅｎｔｏｃｅｒｕｓ新属，二新种：丽江扁角姬蜂Ｌ．ｌｉｊｉａｎｇｅｎｓｉｓ和齿扁角姬蜂Ｌ．ｄｅｎｔａｔｕｓ新种。模式标本保存在中国科学院昆明动物研究所。

A new genus and two new species of the tribe Sphecophagina,subfamily Gelinae are described in this paper: Lentocerus Dong gen. et sp. nov.; Lentocerus lijiangensis Dong, sp. nov.; Lentocerus dentatus Dong, sp. nov..Type specimens are deposited in the Kunming Institute of Zoology,Academia Sinica. Lentocerus gen. nov. Medium sized insects. Black, with yellow marks. Clypeus strongly convex, its apical margin round, shorter.Occipital carina joining hypostomal carina base of mandible. Eye oval,slightly projecting in middle part. Mandible with 2 teeth equal. Antennae flattened in the middle part of the flagellum. Mesoscutum convex in middle lobe. Notaulices distinct,with a horse shoe shaped depressed in the confluent point to apical margin. Epomia shorter,thick. Propodeal spiracle circular. Apical transverse carina of propodeum completed. Areola distinct, long. Wing hyaline, intercubital vein is set in inner lateral of 2nd recurrent vein,2nd intercubital absent,2nd recurrent vein with a single bulla. Mediella vein strongly curved. Nervellus vein curved towards inside.Petiole stout,with central longitudinal carina and coarsely punctures, spiracle placed before the midlength of the tergite.Abdomen without epiplearum,lanceolate,compressed. Thyridia moderately large and distinctly impressed,space between them larger than width of a thyridium.Ovipositor sheath hardly surpassing tip of abdomen. Type species: Lentocerus lijiangensis Dong, sp. nov. Closely allied to Arthula Cameron and Latibulus Gistel,but differs from the latter two genera by following characters:Antennae flattened in the middle part of the flagellum;Front wing intercubital vein is set in inner lateral of 2nd recurrent vein;Notaulices distinct,with a horse shoe shaped depression in the confluent point to apical margin; Propodeal areola present. 1 Lentocerus lijiangensis Dong, sp. nov.(Figs 1～7) Female: Lenght of body about 7 mm. Front wing 6 mm long. Head transverse, slightly wider than thorax at tegulae.Eye moderate sized, oval, slightly projecting in middle part.Malar space 0 6 times as wide as base of mandible. OOD 0 7 times aslong as IOD. Antennae 32 segmented, strongly flattened from segment 9 to 16, edge smooth, spindl shaped.Pronotum epomia shorter.propodeal areola long, carina weak at base. Tergite 2 of abdomen 0 3times as long as wide. Thyridia nearly triangular,about 4 times as wideas space between them. Male: Antennae 33 segmented, other characters similar to female. Holotype ♀, allotype ♂, Lijiang County, Alt. 2 915 m,Yunnan Province,June 15,1996, coll. Dong Dazhi. 2 Lentocerus dentatus Dong, sp. nov. (Figs 8～12) Male: Lenght of body about 7 2 mm. Front wing 5 5 mm. Head transverse, wider than thorax at tegulae. Eyes oval,slightly concentrate toward vertex. Malar space as wide as base of mandible. OOD as long as IOD. Antennae 37 segmented,strongly flattened from segment 8 to 17, edge with teeth,leaf shaped.Pronotum epomia slender. Propodeal areola ladder shaped. Tergite 2 of abdomen 0 8 times as long as wide. Thyridia narrower, transverse,rectangle, about 6 7 times as wide as space between them. Female: Unknown. Holotype ♂, Lijiang County, Alt. 2 915 m, Yunnan Province,June 15,1996. coll. Dong Dazhi. This new species is allied to L. lijiangensis Dong,sp.nov.,but differs as follows: a) antennae 37 segmented,with teeth at middle part;b)propodeal areola completed; c) petiole selender;d)thyridia narrower,transverse.