Systematic studies on the subfamily Cephalciinae (Hymenoptera, Pamphiliidae) of Japan

1.于1995~1997年6、7月在北海道采集了成虫和幼虫，以丰富以往积累的资料。近几年对北海道落叶松造成危害的一长串头孢菌素在四国古附近被采集，这使得正确鉴定成为可能，它们分属于两属三种。研究的目的是寻找有助于区分物种、定义超种分类群和在属水平上分析系统发育关系的特征。结果发现，成虫不同部位的颜色，特别是头部的颜色模式、头部的标点和毛发，特别是触角旁区域的颜色和毛发，雄性生殖器不同部分的形态等，被发现有助于区分物种；脉序特征、下颌骨的形状、胫骨前部的刺和鳞片的形状和分布、产卵器的形状等被发现有助于在属水平上的系统发育分析。幼虫形态、寄主偏好和取食行为似乎也对物种水平的分类特别有用，但我们对这些特征的了解仍然非常有限。对头头亚科的日本种进行了分类修订，共鉴定出棘头亚科和头头亚科2属25种。在这些物种中，有8种为科学新种或日本动物群新种。研究过程中的部分新发现已经发表在17篇不同的论文中。

1. Adults and larvae of Pamphiliid sawflies were collected in Hokkaido in June and July, 1995 to 1997, to enrich the previously accumulated material. A long series of cephalciines, causing damages to larch in Hokkaido in the last few years, were collected around Shikotsu-ko, and this made the correct identification possible ; they belong to three species of two genera.2. Studies were made to find characters useful for discriminating species, defining supraspecific taxa, and analyzing phylogenetic relationships at the generic level. As a result, coloration of various parts of the adult, particularly the color pattern of the head, the punctuation and pilosity of the head, particularly those of the paraantennal field, configuration of various parts of the male genitalia, etc.were found useful for discriminating species, and venational characters, shape of the mandibles, shape and distribution of the spurs and scales on the fore tibia, shape of the ovipositor, etc., have been found useful for phylogenetic analysis at the generic level. Larval morphology, host preference, and feeding behavior also seem to be useful particularly for the species level classification, but our knowledge on these characters are still very limited.3. Japanese species of the subfamily Cephalciinae were taxonomically revised and 25 species of two genera, Acantholyda and Cephalcia, were recognized. Of these, eight species are new to science or new to the Japanese fauna.4. Part of new findings during the course of the studies have been published in 17 separate papers.