S. Mahunka szerk.: Folia Entomologica Hungarica 64. (Budapest, 2003)

FOLIA ENTOMOLOGICA HUNGARICA ROVARTANI KÖZLEMÉNYEK Volume 64 2003 pp. 95-103. Cixius (Tetracixius) pinivorus sp. n., a new planthopper species from the western Pyrenees (Homoptera: Auchenorrhyncha: Fulgoromorpha: Cixiidae) A. OROSZ Abstract: Description of a new Cixiidae species, Cixius (Tetracixius) pinivorus sp. n. is given, in comparison with its sister species Cixius (Tetracixius) lineolatus Ribaut, 1960. With 19 figures. Key words: Cixiidae, new species, western Pyrenees INTRODUCTION In 2001 a zoological expedition was led to the western Pyrenees, with the research permission of the authorities of Catalonia. The major aim of the expedition was the field study of the Cixiidae fauna of the region, with special reference to the Tachycixiuspyrenaicus species-group. Luckily we had the opportunity to collect a considerable material of this species complex, on the other hand, a short series of an unusual, relatively large Cixiidae species with conspicuous wing pattern was also found during this trip. The study of this series revealed that this species is a close relative of Cixius (Tetracixius) lineolatus Ribaut, 1960, but displays significant differences in the detailes of the ano-genital complex compared with those of the eastern Pyrenean taxon. The concept that these two taxa represent two distinct species has been proven by the subsequent study of the holotype of C. (T.) lineolatus, due to the courtesy of Dr Bourgoin. It is worth mentioning that the study of the holotype could be extended to the external morphology of the specimen, for the details of the ano-genital complex the original figures of Ribaut ( 1960) should be used. The systematic part contains the formal description of the new species, Cixius (Tetracixius) pinivorus sp. n., the detailed comparison (differential diagnose) of the two sister species, and notes on the bionomics and the distribution of the two Cixius species under discussion.