New Species of Egg-Parasitoids of the Family Scelionidae (Hymenoptera, Proctotrupoidea) from Japan

摘要

Nine new species of the genera Gryon, Idris, and Ceratobaeus are described from Japan, Gryon incras-satum is closely related to G. mischa Kononova, but differs from it in the sculpture of the head (without transverse wrinkles on upper side, but with large alveoli; shallow frontal depression not bordered with carina; transverse wrinkles of frontal depression nearly reaching anterior ocellus) and the structure of metasomal tergite II (with large alveoli and short sparse transverse wrinkles at base), Gryon tardus is closely related to G. ennius. It can be distinguished by the shape of the mesosoma (convex and not flattened), bright coloration of the frons above the antennal sockets, sculpture of metasomal tergite II, and coloration of the antennae. Inaddition, G. ennius is distinguished by the triangular metathorax. C. excertus differs in the structure of the antennae (all segments, beginning with 3rd and except for the apical one, wider than long) and the sculpture of metasomal tergite II (densely covered with longitudinal wrinkles curved towards its sides and being longer at tergal margins). The tergite with a bright spot in the middle. Idris alticollis differs from all the congeners in the absence of parapsidal furrows, sculpture of the meso-thorax, scutellum, and metasoma, and non-striate genae. I. flavor is is closely related to I. alticollis, but differs in the striate genae, sculpture of the mesothorax and scutellum (smooth, with small alveoli and larger punctures on their background), thatof metasomal tergite III (with small alveoli and interrupted wrinkles represented by traces in apical part of tergite), and larger size of the body. I. mirabilis is closely related to I. limbus Kononova, but differs from it in the length of the head (0 4.3 times its width in the former, and 0.37 times, in the latter), non-striate genae (striate in I. limbus), length of the stigmal and postmarginal veins (stigmal vein 3 times as long as postmarginal one in I. mirabilis and 6 times, in I. mirabilis), I. filiformis differs from the all other congeners in the structure of metasomal tergite III: long setae are situated along its sides and a bright stripe, covered with long fine wrinkles, in its middle, Ceratobaeus floris is closely related to C. acuminatusBrues and differs from it in the coarser sculpture of the body, coloration of the head, antennae, mesosoma, and legs, and size of the body (1.1 mm long in C. acuminatus).