弯胫大轴甲形态再描记与扫描电镜观察

对重要食菌昆虫———弯胫大轴甲Promethis valgipes valgipes(Marseul)的幼虫和蛹的形态特征进行了详细描述。老熟幼虫伪形,体长达45mm,肛节锥形,有黑褐色尾突2枚、锥刺约10枚。蛹长25～32mm,宽8～9mm,体略扁,腹部每节两侧有1侧突,其由2～4枚角突组成并呈扇形排列;肛节背面有2枚尾突,腹面有2个小刺突群。电镜下可见成虫复眼的小眼面呈六边形;触角从第5节到末节的腔锥形感器数量明显增多;口器具毛形感器和栓锥形感器;鞘翅反面有中侧斑、基侧斑和基中斑等特征;后翅均布短刺;外生殖器有多种毛形感器。文中给出了感器及体表附属物的电镜照片。

The morphology supplement of Promethis valgipes valgipes from scarning electron microscopy

Promethis valgipes valgipes(Marseul)is one of important fungus-eating insects,whose morphological characters are detailed in this paper.Mature larvae,which are referred to as “false wireworms",can be as long as about 45 mm,and the body consists of twelve segments.The anal segment is cone-shaped,with two conical blackish brown caudate processes and about ten small stings dorsally.The pupa is 25～32 mm in length and 8～9 mm in width,whose abdomen is a little flat.There are nine segments in the abdomen,each of which carries a pair of sector-like lateral processes comprising 2～4 processus angularises,and the last segment having a pair of urogomphi in the back and two groups of obtuse spines in the abdomen.The adult is primarily observed with scanning electron microscopy firstly:the oculus are composed of hexagonal stemmata;the sensilla coeloconicum has a obviously higher density from the fifth section to the terminal of antenna;mouthparts have sensilla trichodea and sensilla styloconicum;there are the medio-lateral binding patch,the baso-lateral binding patch and the baso-mesial binding patch at the inside elytra;hind-wings have a lot of spinescences and well-distributed;and aedeagus have a few types of sensilla trichodea.Besides,some photos of the scanning electron microscopy of sensilla and external appendages are also provided in this article.