Somogyi Múzeumok Közleményei 18. (Kaposvár, 2008)

HARIS ATTILA: New Nematinae species from Mongolia (Hymenoptera: Tenthredinidae)

Somogyi Múzeumok Közleményei 18: 77-80 Kaposvár, 2008 New Nematinae species from Mongolia (Hymenoptera: Tenthredînidae) ATTILA HARIS H-8141 Úrhida, Petőfi u. 103., Hungary, e-mail: attilaharis@yahoo.com HARIS, A.: New Nematinae species from Mongolia (Hymenoptera: Tenthredînidae). Abstract: Three new Nematinae species are described from Mongolia: Pachynematus mongolovagus spec, nov., Pristiphora rubrocaudata spec. nov. and Amauronematus mongoloviduatus spec. nov. and compared to Pachynematus declinatus (Förster, 1854), P. obductus (Hartig, 1837), P. vagus (Fabricius, 1781), Pristiphora bensoni Lindqvist, 1953 and Amauronematus viduatus (Zetterstedt, 1838). Keywords: Nematinae, Hymenoptera, Tenthredînidae, new species, Mongolia Introduction This is my third contribution to the knowledge of the Nematinae fauna of Mongolia. In my first paper (HARIS 2002), I gave descriptions of 15 new species and listed other 51 species new for the Mongolian fauna. This was the first report on the Mongolian Nematinae species. In 2003, I provided descriptions of further three species based on Dr. Zoltán Kaszab's expeditions which were taken between 1963 and 1968 (HARIS 2003). Now, the known number of Nematinae species reported from Mongolia amounts 72. This is about 40% of the estimated species-richness of the country. The mountains of Mongolia is aboundant in endemic Nematinae species, about 30% of the known species are endemic. Description of new species Pachynematus (Pachynematus) mongolovagus sp. nov. Holotype: female, Mongolia, Orkhon, Urti nurun, 26. 06. 1997 leg.: Hogd T. C. The holotype is deposited in the Hymenoptera collection of the American Museum of Natural History, New York. Female. Head black. Clypeus, mandibles and labrum yellowish brown, clypeus with dark brown anterior margin. Palpi yellow. Antenna dark brown, flagellar segments ventrally yellowish brown. Thorax black, pronotum, tegulae yellow, cenchri brownish white. Mesopleuron yellowish brown. Abdominal tergites dark brown, tergites 4-8 with narrow yellowish anterior margines. Tergites 9, 10 and sternites yellow. Legs nearly entirely yelllow but tibial apices and last segment of hind tarsus brown. Ovipositor black with brownish yellow basal part. Wings hyaline, venation dark brown, stigma, costa and subcosta yellow. Frontal, ocellar area and upper inner orbits uniformly, moderately deeply punctured, moderately shiny. Punctures on temples and vertex small and not uniform, rather shiny. Mesonotal lobes with small, rather sparse, uniform and shallow punctures, moderately shiny. Mesoscutellum, mesoscutellar appendage and metascutellum with sparse small sporadic punctures, shiny. Tergites 1-5 with fine surface granulation, moderately shiny, other tergites with fine undefined surface sculpture, shiny. Mesopleuron smooth and shiny. Head and thorax sparsely covered with whitish pubescence about 2/3* as long as diameter of front ocellus. Hind margin of head smooth (without carina), postocellar furrows deep, straight and paralell. Clypeus widely, roundly emarginated. Clypeal emergination about 1/3* as deep as clypeal median length. Ratio of antennái segments: 6:2:20:19:17:15: other segments missing. Gena as long as diameter of anterior ocellus. Head contracted behind eyes. Pentagonal frontal area flat, hardly marked. OOL : POL : OCL: 7:10:5. Longest diameter of eye: length of 3rd antennái segment: 23 : 20. Length of ovipositor : length of hind tibia: 27 : 50. Lenght of hind basitarsus : length of inner hind tibial spur : apical width of hind tibia: 16:9:6. Claws with minute inner tooth. Sawsheath blunt, cerci overprojecting apex of sawsheath (Fig. 1). Length: 6.1 mm. The new species is related to Pachynematus vagus (Fabricius, 1781). However, P. vagus has black mesopleuron, apex of sawsheath acute and cerci never overprojecting the apex of the sawsheath. The new species has the mesopleuron yellowish brown, sawsheath blunt as it figured in Fig. 1 and cerci overprojecting the apex of the sawsheath. The following species have abdominal sternites white and relatively long inner hind tibial spur (vagusobductus group). 1. Sawsheath acute, cerci never overprojecting sawsheath. Mesopleuron always black. Legs entirelly yellow 2. 2. Sawsheath blunt, cerci variable, in one species overprojecting sawsheath. Colour of legs and mesopleuron variable. (If legs entirely yellow, sawsheath in dorsal view small, cerci long overprojecting the apex of sawsheath. If cerci shorter or equal with sawsheath than at least apex of hind femur black or dark coloured) 4.