S. Mahunka szerk.: Folia Entomologica Hungarica 50. (Budapest, 1989)
ROVARTANI KÖZLEMÉNYEK L 1989 p. 37-40 New synonymy of Japananus hyalinus (Osborn, 1900), and new findings of the species in Hungary and Bulgaria (Homoptera: Qcadellidae) By P. LAUTERER (Received April 30, 1980) Abstract; New synonymy of Japananus hyalinus (Osborn, 1900), and new findings of the species in Hungary and Bulgaria (Homoptera: Cicadellidae) Japananus meridionalis Bonfils, 1981, is synonymized as a younger subjective synonym of J. hyalinus Osborn, 1900. The species is recorded for the first time for the territory of Hungary and Bulgaria. In Europe, the focal distribution of the species changes into overall. Originally the two Japananus spp. occurred in the Manchurian Subregion of the Palaearctic Region. In the course of the nineteenth century, J. hyalinus probably spread also to North America except for Alaska, Canada and several northern parts of the USA. From there it was also described by Osborn in 1900 in the genus Platymetopius . The genus Japa- nanus was established by Ball in 1931 for this species and for Platymetopius aceris Matsumura. Both these species are trophically adapted to representatives of the genus Acer (Aceraceae). The occurrence of J. hyalinus in North America is considered to be secondary by both Oman (1949) and Hamilton (1983). In eastern Asia the species occurs in Manchuria, Japan and the Maritime Region of the USSR. Findings of the species in Europe are altogether recent. The first one was made in Austria in August, 1942 (Wagner et Franz 1961). Further findings have been published by Dlabola (1961) from three localities in Rumania where the species was abundant in original vegetation in localities far away from any means of conveyance, indicating long-lasting immigration. Jankovic (1976) published a finding of two specimens in Yugoslavia where, according to a personal communication by Dr. J. Dlabola, the species was later abundant in several localities in Serbia, and Dlabola collected it also in the western foothills of the Caucasus in the environs of the town of Dagomys, USSR. Lauterer (1980) published a finding of the species in Czechoslovakia. In 1981, Bonfils published the description of Japananus meridionalis, a species which differed in minute details from the American population of J. hyalinus , and illustrated its male terminalia. Lauterer (1984) illustrated the male terminállá of specimens from the populations in southern Moravia (Czechoslovakia) and Kentucky (USA), and the remarkable variation in the shape of the anterior part of head of both sexes. The author evaluated the Moravian population as being closer to the description of J. meridionalis and pointed out that studies of wider populations are necessary to find out whether J. meridionalis f alls within the variation range of J. hyalinus . The late Dr. J. Vilbaste kindly compared the Moravian specimens with his material from the Maritime Region of the USSR, and assured me in his latter that they were identical. Detailed illustrations of male terminalia of J. hyalinus and J. aceris from the Maritime Region of the USSR have been provided by Anufriev (1978). The terminalia of the former species do not essentially differ from the illustration of J. meri dionalis Bonfils; however, the author did not mention variation in the shape of the head.
