An annotated list of the name-bearing types of species-group names in Odonata preserved in the University of Michigan Museum of Zoology

-T~I~S catalog presents a listing of all species-group names associated with Odonata specimens currently housed in the type collection in the University of Michigan Museum of Zoology (UMMZ), Ann Arbor, MI. The names represent species described by P.P. Calvert, L.K. Gloyd, F. Forster, M.A. Lieftinck, C.H. Kennedy, F. Ris, E.B. Williamson and others, and transcription of data labels, reference and current status have been included. Alectotype is designated for Argia cyathigera Navis in order to stabilize that name. The following are new synonyms: Mecistogaster garleppi Forster, 1903 = Mecisfogaster buckleyi McLachlan, 1881; Argia a~lgustana NavAs, 1934 = Argia A ~~?cdullaris Hagen irz Selys, 1865; Argia dagizina Navis, 1914 = Avgia ilzdicatrix Calvert, 1902; Argia inaclzadiizn Navris, 1914 = Argia difficilis Selys, 1865; Argia inedii~eizsis Navis, 1935 = Argia gerhardi Calvert, 1909. Of 389 names, 85 are considered junior synonyms.