中国肩花蝽属记述(半翅目:花蝽科)

A REPORT ON GENUS TETRAPHLEPS FROM CHINA (HEMIPTERA:ANTHOCORIDAE)

肩花蝽属(Tetraphleps Fieber)是花蝽科中的一个不大的属,世界已知共十余种。该属的已知生物学资料说明此类花蝽喜生活在针叶树上,捕食蚜虫和蓟马等,是这些森林害虫的一类潜在天敌。近年加拿大即曾试从印度和巴基斯坦引入此属的花蝽以防治球蚜Adclges piceae(Clark et al 1971;Kelton 1966,1978)。我国迄今尚无此属的明确记录,仅 Pericart(1972)在 T.aterrimus(J.Sahlberg)的分布记录中提及“天山”,但未注明国别,其分布图则似包括我国新疆天山的范围。在历年来收集的花蝽科标本中,我们共发现此属5个种,其中包括3个新种和一个中国新记录种,现分别记述于下。新种模式标本均存在南开大学生物系。描述中的量度单位为mm。

Tetraphleps aterrimas (J.Sahlberg)1878Hebei(Weichang 41°55'N,117°50'E),Jilin(Mt.Changbai 42°10'N,128°10'E,740m.alt.,on Pinus densiflora),Xinjiang(Balikun 43°36'N,93°E)Telraphleps galenanoides Ghauri 1972,new recordSichuan (Lixian 31°40'N,102°54'E,2800-4000m.alt.),Yuman(Kumming 25°N,103°E,on Pinus sp.).Tetraphleps parallelus Bu et Zheng sp.nov.(figs.1,5,7)Body elongate,robust,parallel-sided.Head comparatively small,blackish brown,length 0.56,width 0.46,interocular space 0.26.Antenna blackish brown,seg.II testaceous subbasally,seg.length 0.20:0.62:0.34:0.34.Rostrum attaining to coxa of fore-leg.Pronotum testaceous with collar,callus and antero-lateral area black,length 0.59,collar width 0.40,posterior margin width 1.40,lateral margin slightly concave,flattened antero-lateral margin broad and reflexed,rugosities of posterior lobe extending to hind margin medially.Hemelytron testaceous,membrane greyish brown,exocoriurn length 1.50,cuncus length 1.0.Ostiolar peritreme slender Straight slightly narrowed centrally,apex free from the pleuron,with a fine ridge oa metapleuron in front of the peritreme (fig.5).Legs ferrugineous to piceus with tibia testaceous.Clasper as shown in fig.7.Body tength 4.7-5.0,width 1.6-1.8.Holotype paratypes 1 3 Sichuan (Lixian 32°N,102°50'E,2800m.alt),1963.Ⅷ.7,on Abies sp.Somewhat allied to T.raoi Ghauri,but with larger body,narrower head,longer ostiolar peritreme,lighter coloration and lateral margin of pronotum running a little more laterad.Tetraphleps yulongensis Bu et Zheng sp.nov.(figs.2,4,8)Ferrugineous to black.Head black,length 0.58,width 0.58,interocular space 0.34.Antenna black,seg.length 0.20:0.66:0.40:0.42,0.23:0.68:0.42:0.44,seg.Ⅱ somewhat club-shaped in Rostrum reaching apex of coxa of front leg.Pronotum with collar and callus black,posterior lobe ferrugineous,pronotal length 0.58,collar width 0.48,hind margin width 1.48,lateral margin broadly convex,flattened antero-lateral margin narrow and reflexed,rugosities on posterior lobe reaching hind margin.Hemelytron ferrugineous,membrane greyish brown,corium slightly broadened medially,exocorium length 1.54,cuneus length 1.0.Ostiolar peritreme (fig.4) short,apex truncate,far from lateral margin of metaple-uron,metapleuron with a fine ridge on its anterior half.Legs ferrugineous.Clasper as shown in fig.8,with outer margin reflexed basally and strigose sub-medially.Body length 4.5-5.0,width 1.7-2.1.Holotype paratypes 2 2 Yunnan (Mt.Yulong 27°N,,102°20'E,2760-3000 m.alt.),1979.Ⅷ.10,on Picea sp.Close to T.raoi Ghauri,but with following differences:Body larger,antennal seg.Ⅱ not broader than I,seg.I longer,reaching head apex.Pronotum broader,bicolored flattened anterolateral margin more restricted.Ostiolar peritreme different.Tetraphleps pilosulus Bu et Zheng sp.nov.(figs.3,6)Closely allied with Acompocoris pilipes Stys from Soviet Kazakhstan in body form,coloration,and the characteristic pubescence on pronotum and legs but with pronotum narrower and distinctly drooping-shouldered,collar comparatively broader,lateral margin more straight;ostiolar peritreme a little shorter,apex straight,not bending backward.Head length 0.49,width 0.48,interocular space 0.26;antennal seg.length 0.18:0.46:0.26 seg.I just reaching head apex.Rostrum reaching basal part of mesosternum.Pronotum length 0.50,collar width 0.40,hind margin width 1.12.Exocorium length 1.07,cuneus length 0.80.Body length 3.5-3.7,width 1.3-1.4.Holotype paratypes 2 Xinjiang (Balikun,40°36'N,90°E),1975.Ⅶ.19.(Note:Judging from the structure of ostiolar peritreme and metapleuron,we take the opinion of Ghauri (1964) that pilipes Stys 1960 originally described under genus Acompocoris is actually a member of Tetraphleps).