S. Mahunka szerk.: Folia Entomologica Hungarica 62. (Budapest, 2001)

shining, moderately deeply and densely punctured. Outer half of lateral mesonotal lobes shining, sporadically punctured. Pronotum finely and densely punctured. Mesopleuron shining with sporadic shallow punctures. Mesoscutellum shining, sporadically and deeply punctured with undefined surface sculpture between the punctures. Mesoscutellar appendage and postscutellum smooth and shining. Ratios of the hind tarsal segments: (basitarsus) 27:12:9:4 ?(missing). Length of the inner hind tibial spur/basitarsus = 12/27. Length of hind femur/hind tibia = 50/72. Length of a cenchrus/distance between cenchri = 10/13. Abdominal tergites with very fine transverse surface sculpture. Apical projection of the eight tergite rounded (Fig. 3). Its length/width = 1/1. Penis valve in Fig. 2. Lenght: 5.5 mm. Holotype — Male: Quercetum-petreae-cerris, cserjeszint (bush level), Malaise csapda [trap], alt. 0-3 m, Hungária, Noszvaj, Síkfőkút, 1987. VI. 20, leg.: Mészáros Z. The holotype is deposited in the collection of the Hungarian Natural History Museum, Budapest. The new species is closely related to Pachynematus declinatus (Förster, 1854). The two species differ in the structure of penis valve (Zhelochovtsev 1988 and Fig. 2). Pachynematus declinatus larger, 8.0 mm and its colour is extensively black, only base of mandibles, clypeus and hypopygium yellow. Mesoneura nigrostigmata sp. n. Head black, including antennae. Labrum, mostly the clypeus — except its basal margin — mandibles and palpi yellow. Thorax yellow. Mesonotal middle furrow with longitudinal brownish black suffusion. There are three longitudinal dark brown suffusius on the mesosternum, one alongside the middle furrow and one-one parallel with it. Prosternum black. Legs yellow, except the very bases of coxae. Wings hyaline, stigma, apical half of costa and venation dark brown. Basal half of costa yellow. There is a brown spot under the base of the stigma (Fig. 5). Fore wing with four cubital and three middle cells. Radial crossvein at the very base of the elongated radial cell. It divides the radial cell in 8:33 proportion. Hind wings with two cubital (one closed and one opened) and two middle cells (one closed and one open). Abdomen, cerci yellow, sawsheath — except its base — brown. Head, pronotum, propleuron shining with fine, irregular punctures. Mesoscutellum, mesoscutellar appendage, postscutellum, mesopleuron, mesosternum and abdomen smooth and shining. Pubescence whitish and very short, about 0.25 times as long as the diameter of front ocellus. The body seems to be bald, pubescence seens only under great magnification (60 times or more). Ratios of the antennái segments: 5:3:17:20:20:16:12: ? (missing):?. Head moderately narrowed behind the eyes, contracted to their middle longitudinal line. Occipital region without carina. Inner margins of eyes subparallel. Supraantennal area with deep, round fovea. OOL:POL:OCL = 11:9:6. Diameter of front ocellus/length of vertex = 5:6. Length of genae/diameter of front ocellus = 3.5:5.0. Clypeus roundly emarginated, 1/3 times as deep as its median length. Mesoscutellum flat, mesoscutellar appendage narrow. Claws nearly bifid, inner tooth only sligthly shorter than outer. Sawsheath in Fig. 6. Cerci long, reaching over the sawsheath. Length: 6.3 mm. Holotype — Female: Hungária, Szögliget, Ménes-völgy, 24. 04. 1990, leg. Merkl, O. The holotype is deposited in the Hungarian Natural History Museum, Budapest. The new species resembles Mesoneura lanigera Benson, 1954. Mesoneura lanigera Benson, 1954 has yellow supraclypeal area, black broken vitta on each lateral mesono-