Matskási István (szerk.): A Magyar Természettudományi Múzeum évkönyve 80. (Budapest 1988)
Vásárhelyi, T.: New Palaearctic Aradus species in the betulae-group (Heteroptera, Aradidae)
ANNALES HISTORICO-NATU RALES MUSEI NATIONALIS HUNGARICI Tomus 80. Budapest, 1988 p. 57-63. New Palaearctic Aradus species in the betulae-group (Heteroptera, Aradidae) by T. VÁSÁRHELYI, Budapest T. VÁSÁRHELYI: New Palaearctic Aradus species in the betulae-group (Heteroptera, Aradidae). — Annls hist.-nat. Mus. natn. hung. 1988 80: 57-63. Abstract — Descriptions of Aradus obscurus sp. n. from the southern part of the Mediterranean and of A. obtectus sp. n. previously considered A. pictus BAER. in the literature are given, and the differences between the latter two species are tabulated. With 34 figures. In the course of revision of the Palaearctic Aradidae, I had the. priviledge to investigate materials from different institutions. It was during this study that I found two undescribed species, both, for different reasons, considered a different species. The case of A. obscurus is the simpler of the two: HORVÁTH detected that the only male at hand was an unknown species but he never described it (see the respective data on the labels of the holotype). KORMILEV identified it as A. brenskei KRUEPER. Investigation of the male genitalia and further comparative material revealed its present status. Aradus pictus was described by BAERENSPRUNG (1859) on the basis of material from the Parnassus collected by KRUEPER, and his figure, though small, shows all the distinguishing characters except the male genitalia,, colouration and lack of white teeth on the legs and antenna. FABRICIUS described A. varius (1803), and FALLÉN misidentified this species as varius. The first good description of the species, under the name varius, is given by FIEBER (1861) with the character of the missing white teeth. It was this paper, or this character, which probably led later entomologists not to investigate the species accurately, and after REUTER (1902) clarified the difference of FABRICIUS' and FALLEN'S varius, "pictus" became a "holopalaearctic" species. Here again investigation of the male genitalia and the original type material helped to clarify the situation. Aradus pictus (BAER.) seems to be a Mediterranean species and the rest of the Palaearctic is inhabited by obtectus. The figure given by WAGNER (1955) is the paramer of real pictus, though the hairs are located somewhat differently, those by VÁSÁRHELYI (1976) and KANYUKOVA (1984) show details of male genitalia of obtectus. The figures of this paper, with the exception of Figs 5, 25-28, were made with the help of a drawing apparatus. Aradus pictus BAERENSPRUNG, 1859 The original paper mentions the locality: "Unter Fichtenrinde auf dem Parnass (Krüper)." The original type series is deposited in the Zoological Museum of the Humboldt University, Berlin and consists of 4 females and 1 fragment, all bearing the label: "Graec. Krp." One female, bearing also the labels "8805" "pictus v. Barenspr." [handwriting] and "typus" is designated here as lectotype. Two paralectotype females bear the label "Aradus pictus Bär. (varius auct. nec Fabr.), Reuter det." [handwriting]. Other materials investigated: "Parnass", "Graecia, Krueper" (possibly part of the type series sent to G. Horváth, 1 female), "Graecia" (2 females of different collectings), "Parnass" (1 male, 1 female possibly of the same collecting), "NT Valsental" (1 male), "Graecia, Parnas" (1 male) and "Anavriti, Ellas" (1 female).
