Acta entomologica serbica, 2016, 21: 21-25 UDC 595.792(497.11) 595.762-169(497.11) DOI: 10.5281/zenodo.198397 AYLAX PAPAVERIS (PERRIS 1839) AND BARBOTINIA ORANIENSIS (BARBOTIN 1964): SPECIES NEW TO THE FAUNA OF CYNIPID GALL WASPS (HYMENOPTERA, CYNIPIDAE) OF SERBIA ALEKSANDAR STOJANOVIĆ 1 and ČEDOMIR MARKOVIĆ 2 1 Natural History Museum, Njegoševa 51, 11000 Belgrade, Serbia E-mail: aleksandar@nhmbeo.rs 2 University of Belgrade, Faculty of Forestry, Kneza Višeslava 1, 11030 Belgrade, Serbia E-mail: markovicc@ptt.rs (corresponding author) Abstract Never recorded before in Serbia, the cynipid gall wasps Aylax papaveris (Perris 1839) and Barbotinia oraniensis (Barbotin 1964) were obtained from capsules of Papaver rhoeas Linnaeus 1753 collected toward the end of June 1998 at the locality Surduk (Srem, Serbia). Nine species of parasitoids were also obtained. Among them were the species Ormyrus capsalis Askew 1994 and Baryscapus papaveris Graham 1991, never before found in Serbia. KEYWORDS: fauna, Serbia, Papaver rhoeas, Cynipidae, parasitoids Introduction In entomological collections, it is often possible to come across species that are very important for certain regions, but whose findings have not yet been published. Examining material that we collected over the past 20 years in our study of the cynipid gall wasp fauna of Serbia, we found two species obtained from capsules of Papaver rhoeas Linnaeus 1753 (Papaveraceae) that had never before been recorded in Serbia (Langhoffer 1915; Baudyš 1928; Pal 1983a and b; Glavendekić & Mihajlović 2004). One of these species was Aylax papaveris (Perris 1839), and the other Barbotinia oraniensis (Barbotin 1964). Inasmuch as the cynipid gall wasps of herbaceous plants in Serbia have not been investigated at all up to now (Langhoffer 1915; Baudyš 1928; Pal 1983a and b; Mihajlović & Marković 2003; Glavendekić & Mihajlović 2004; Marković & Stojanović 2007, 2009; Marković 2014, 2015), the finding of