S. Mahunka szerk.: Folia Entomologica Hungarica 50. (Budapest, 1989)

which the species spreads over Europe, North America may have been populated by it in the course of fifty years, and Oman's (1949) opinion that the species is not indigenous to North America seems to be justified. The species develops on Acer spp. In Japan it is mainly Acer palmatum, in the Maritime Region A. ginnala, in Europe mainly A. campestre. On the latter it was collected by Jankovic (1976) and by Lauterer in the case of all published findings, even the newly published ones, in Czechoslovakia and in other countries. The adults are vagrant and are often found even on other plants. Lauterer collected the larvae mostly from higher parts of crowns, adults descend to lower strata and frequent various members of the herb stratum. Disturbed adults assume a characteristic posture with partly spread wings, which is unusual with leafhoppers. Undisturbed resting adults hold their wings over their body in a roof-like attitude, as in other Clcadellidae. I have observed adults slighting, in rainy weather, in dry places such as tree trunks, outer and inner walls of buildings, as is usual with numerous arboricolous Cicadellidae (e.g. Aguriahana s te Hula ta (Burm.), Alebra wahlbergi (Boh.) Alnetoidia alneti (Dahlb.), etc.). J. hyalinus is also attracted by artificial light, especially mercury vapour lamps. The development of the species is considerably dependent upon air temperature. According to Lauterer (1980) the species is apparently univoltine in Czechoslovakia, the adults occurring rather late, from early August till autumn. In 1987, Lauterer observed considerably earlier development in southern Europe; in mid-July, adults were advanced in development in Bulgaria to the extent that they probably had emerged as early as the beginning of July, and it is probable that the species may be bivoltine in that country. Arzone, Vidano and Alma (19 87) reported that the species is bivoltine in northern Italy. It may be assumed that as the species gradually spreads northwards it attains greater tolerance towards colder climate. The findings made in Hungary and Bulgaria are new for the countries; those made in Czechoslovakia and Rumania serve to supplement data on the spreading of the species. Hungária mer. or. : Szarvas, along the road and Körös river bank near the arboretum, on Acer campestre, 95 m a. s. 1. , 27. VII. 1987, 5 (Í 6 ç. Bulgaria or. : Varna, Zlatni Pjasaci, sector D, 30 m a. s.l., camp, at light, 22. VII. 1987, 9 ê 2 ç; Ibid., netted, 24. VII. 1987, 1 6; Bulgaria bor. : Pleven, Kajlaka, 100 m a. s.l., on mercury light, 24. VII. 1987, 1 6. Rumania mer. : Acer campestre woodland along the road between Vinju Mare and Rogova, 80 m a. s. 1., 26. VII. 1987, 4 6* 4 o. Czechoslovakia: Moravia centr. : Brno-Cerveny kopec, 240 m a. s.l., 11. IX. 1984, 1 larva. Brno-Lisen, above the Ricka valley, 320 m a. s.l., 4.X. 1986, 1 o.. Moravia mer. : Tvorihráz, a woodland valley with Acer campestre, 20. VIII. 1984, 2 <j> and larvae. REFERENCE ANUFRIEV, G.A. (1978): Cikadki primorakogo kraja. - Trudy Vses. ent. Obshch, 60: 1-215. ARZONE, A., VIDANO, C. and ALMA, A. (1987): Auchenorrhyncha introduced into Europe from the Nearctic region: taxonomic and phytopathological problems. - Proc. 2nd Intern, workshop on leafhoppers and planthoppers of economic importance, Provo: 3-17. BONFILS, J. (1981): Description d'espèces nouvelles de Cicadellidae récoltées dans le Midi de la France et en Corse (Horn. ). - Bull. Soc. ent. Fr., 86: 298-307. DLABOLA, J. (1961): Neue und bisher unbeschriebene Zikaden-Arten aus Rumänien und Italien (Horn., Auchenorrh. ). - Acta Soc. ent. Cechoslov., 58 (4): 310-323. HAMILTON, K.G. A. Í1983): Introduced and native leafhoppers common to the Old World and New World. - Can. Ent., 115: 473-512. JANKOVIC, L. C1976): A study of cicadas (Auchenorrhyncha: Homoptera) of Fruska Gora. Zbor. prirod. nauke, Beograd, 50: 127-171.