摘要
本文报道贵州的白长足虻属ＰｈａｌａｃｒｏｓｏｍａＢｅｃｋｅｒ２新种：银白长足虻Ｐ．ａｒｇｙｒｅａｓｐ．ｎｏｖ．和壮白长足虻Ｐ．ｂｒｉａｒｅａｓｐ．ｎｏｖ．。文中附本属世界已知种检索表。模式标本保存于安顺地区卫生防疫站。
The present paper deals with 2 new species of the genus Phalacrosoma Becker from southwestern China. A key to 5 species occured in the world is given in Chinese text.All type specimens are deposited in the authors'collection. 1.Phalacrosoma argyrea Wei et Liu, sp. nov (figs, 1-4):This species resembles P. amoenum Becker, but differs from the latter in the follwing characters:antenae dark-brown, palpi yellow, proboscis brown-yellow, occiput dark-green, dorsum of thorax without longitudinal grey stripes, acr present, hair-like; t2without characteristic curved hairs ventrally and long bristles apically, middle basetarsus to 3rd tarsomere without long setae.Body length:♂5 mm.Holotype ♂, Longgong(1000m,26°2' N, 105°9' E), Anshun City, Guizhou Province, 8. Ⅷ.1993, collected by Wei Lianmeng and Liu Guobin;paratypes 3 ♂♂,3, 22. Ⅶ. 1994, same locality as holotype, collected by Wei Lianmeng,Li Shixiang and Du Yuzhou. 2. Phalacrosoma briarea Wei et Liu, sp. nov. (figs. 5-8):This species is closely related to P. imperfectum Becker, but it cam be easily distinguished by dorsum of thorax with hair-like acr;t2 with pale long fringes in base of ventral surface, t2 and middle tarsus with characteristic, erect, curved setae;tergites with postmarginal rows poorly developed except one on the lst tergite.Bodg length:♂ 4.5-6. 0mm Holotype ♂, Longgong(1000 m, 26°2'N, 105°9'E), Anshun City, Guizhou Province,8. Ⅷ.1993,collected by Wei Lianmeng and Liu Guobin; paratypes 13♂♂, same locality as holotype, 20. Ⅷ.1991,8, 26. Ⅷ. 1993 and 3, 22. Ⅶ. 1994, collected by Wei Lianmeng, Li Shixiang and Du Yuzhou; 1♂ ,Jiaozhishan (1500 m), Anshun City, Guizhou Province, 17. Ⅶ.1994, collected by Wei Lianmeng,Wu Chuangang and Wei Xuan.
基金
国家自然科学基金
贵州省科学技术基金
