九州から新しく記録されたタマバエ2種について

抄録

This paper is intended to record two gall midges which have recently been found in Kyushu, Japan. The first species is the sorghum midge, Contarinia sorghicola COQ., which is widely distributed in the world and sometimes causes serious damage on Sorghum species (HARRIS, 1970). In Japan, WATANABE & YAMADA (1953) have reported the presence of a gall midge which attacks the grain of Sudan grass (Sorghum arundinaceum var. sudanense). It is highly probable that this species is identical with the sorghum midge, though the authors have not seen specimens. The first confirmation of the species was made in 1974 when specimens collected from grain sorghum (S. vulgare) in Kagoshima-pref. were identified as Contarinia sorghicola by Mr. K. M. HARRIS (CIE in BMNH). As this species has not been extensively studied in Japan, its detailed life cycle is unknown at the moment, but there was a tendency in 1974 for emergences of adults to reach a peak in October. The second species is a Mycodiplosis sp. The members of the genus are associated with rusts, Puccinia spp. and other species of related genera on various plants. More than 50 species of Mycodiplosis have been described in the world, but few comparative studies have been made, and identification is based almost entirely on host records (HARRIS, 1966). The following collections of Mycodiplosis species have been made in Kyushu, Japan: Bungo-Takada, 22. VI. 1970, Puccinia allii on Allium fistulosum L. ; Kanoya, 2-3. VII. 1970, P. coronata on Festuca arundinacea SCHR. and Lorium multiflorum LAM. ; Ibusuki, 23. V. 1970, P. sp. on Triticum aestivum L.; Kushira, Kagoshima, P. arachidis on Arachis hypogaea L. To avoid further confusion in nomenclature of Mycodiplosis, the authors have postponed the speci-fic identification of these gall midges until comparative studies are made in the future. Based on field investigations conducted by the authors, it is roughly indicated that Mycodiplosis sp. on Arachis hypogaea completes one generation within a month, and its larvae and pupae(including those in cocoons) are distributed almost uniformly on the leaves of A. hypogaea.