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

1. 1995年至1997年6月和7月在北海道采集了扁叶蜂成虫和幼虫，以丰富以前积累的材料。近年来在北海道的落叶松上采集到一系列危害落叶松的木贼，这使得对木贼的正确鉴定成为可能，它们分属于两个属的三个种。本研究旨在寻找可用于区分物种、界定超种分类群和分析属级系统发育关系的性状。结果发现，成虫各部位的颜色，特别是头部的颜色图案，头部的标点和毛，特别是触角旁区的标点和毛，雄性生殖器各部位的构造等，以及脉序特征，下颌形状，前胫骨上的刺和鳞片的形状和分布，产卵器的形状，等等，已被发现有用的系统发育分析在属的水平。幼虫形态、寄主选择性和取食行为也对种级分类有一定的帮助，但我们对这些特征的认识还很有限.对日本的头叶蜂亚科的种类进行了分类学修订，共鉴定出头叶蜂亚科和头叶蜂亚科2属25种。其中，8个物种是科学上的新物种或日本动物区系的新物种。研究过程中的部分新发现已发表在17篇单独的论文中。

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.