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

Deitmer, 1924, and S. maculosus Tavares, 1925 are syn. n. of S. gallaepomiformis (Boyer de Fonscolombe, 1832); S. bipunctatus Hartig, 1841 and S. crassicornis Hartig, 1843 are syn. n. of S. incrassatus Hartig, 1840; S. carinulatus Deitmer, 1924 is a syn. n. of S. crassicornis (Curtis, 1838); S. nigripes Hartig, 1840, S.flavicornis Hartig, 1840,5. nervosus Hartig, 1840,5. varius Hartig, 1841,5. variolosus Hartig, 1841, S. albipes Hartig, 1841, S. xanthocerus Hartig, 1841, S. fulvipes Dettmer, 1924, and 5. tscheki Mayr, 1873 are syn. n. of S. pallipes Hartig, 1840; S. radiaîus radiaîus Dalla Torre et Kieffer, 1910,5. radiatus testaceipes Tavares, 1901, 5. tscheki f. radiatus Ross, 1951 are syn. n. of 5. radiatus Mayr, 1872; 5. punctatus Vasileva-Samnalieva, 1984 is a syn. n. of 5. samnalievae Pujade-Villar et Melika, 2003; 5. inflatus Dettmer, 1924 and Xystus testaceus Hait ig, 1841 are syn. n. of 5. thaumacerus (Dalman, 1823); 5. immarginatus Hartig, 1841, 5. erythrostomus Hartig, 1841,5. rotundiventris Mayr, 1882 are syn. n. of 5. tibialis Hartig, 1840; 5. punctatus Dettmer, 1924 is a syn. n. of 5. umbraculus (Olivier, 1791); 5. carinatus Vasileva-Samnalieva, 1985 is a syn. n. of S. vassilevaensis Pujade-Villar et Melika, 2003. Lectotypes for 22 inquiline species (see Appendixes 2-4), Periclistus rosarum, Synergus albipes, S. apicalis Hartig, 1841, 5. carinulatus, S. crassicornis, S. erythrocerus, S. erythro stomus, S. flavicornis, S. immarginatus, S. incrassatus, S. mutabilis Dettmer, 1924, 5. nervosus, S. pallipes, S. punctatus, S. radiatus, S. rotundiventris, S. tibialis, S. tscheki, S. variolosus, S. varius, S. vulgaris Hartig, 1840, and Synophrus pilulae Giraud in Houard, 1911 are designated. Type specimens of Synergus australis, S. basalis, S. bipunctatus S. fulvipes, S. nigripes and 5. xanthocerus were also examined (see Appendix 3). Host cynipid gall-inducing wasps, synonymy, distribution and biological data for each species are given. For 17 species of cynipid inquilines, 45 new cynipid gall wasp hosts are given, which are not yet mentioned in the literature and recorded for the first time in the Hungarian fauna. Identification keys for species distributed in Hungary are given also. LIST OF CYNIPID INQUILINES OF THE HUNGARIAN FAUNA Ceroptres Hartig, 1840 The genus Ceroptres is characterized by three main diagnostic morphological features: two raised vertical carinae going from the ventral margin of antennái sockets and more or less extended to the clypeus (Figs 1A-B); the 1st metasomal tergite is smooth and shining, reduced in a form of a dorsal crescent-shaped pro-