Hartig's collection of Alloxysta species, deposited in the Zoologische Staatssammlung Museum (ZSM, Munich, Germany), is here reviewed. In total, 19 species and 144 specimens have been studied. Fourteen species, of the previous twenty-two, are now valid: Alloxysta aperta (Hartig, 1841), A. brachyptera (Hartig, 1840), A. castanea (Hartig, 1841), A. circumscripta (Hartig, 1841), A. fuscicornis (Hartig, 1841), A. leunisii (Hartig, 1841), A. longipennis (Hartig, 1841), A. macrophadna (Hartig, 1841), A. melanogaster (Hartig, 1840), A. obscurata (Hartig, 1840), A. pilipennis (Hartig, 1840), A. postica (Hartig, 1841), A. minuta (Hartig, 1840) and A. rufiventris (Hartig, 1840). These species are redescribed and their morphological features are illustrated in corresponding plates. Alloxysta cursor (Hartig, 1840) and A. erythrothorax (Hartig, 1840) are considered as 'nomen dubium'. Two new synonyms are here established among Hartig's species: Alloxysta defecta (Hartig, 1841) with A. castanea (Hartig, 1841) and A. flavicornis (Hartig, 1841) with A. pilipennis (Hartig, 1840). Additional material of Alloxysta deposited in this museum has been examined and new host records are here reported.