The Type Specimens of the Odonata in the Entomological Institute, Hokkaido University Author Syoziro Asahina text Insecta matsumurana 1961 24 57 65 journal article http://doi.org/10.5281/zenodo.3516659 2ba41a83-aa08-498a-8d7c-3a5c3debfa99 3516659 10. Trigomphus melampus (Selys, 1869) = Gomphus unifasciatus Oguma, 1926 Gomphus unifasciatus Oguma, 1926 , p. 92, 3, “Hokkaido (Nayoro, Komura)” ( syn . nov.). This species was originally described from three specimens ( 1 ♂ Nayoro, Hokkaido; 1 ♂ Komaba, Tokyo; 1 ♀ Kagoshima, Kyusyu), but at present there is the single specimen ( lectotype ) in the collection. This and the Komaba-specimen which I examined in 1935 are actually the same with G. melampus Selys (1869), hence unifasciatus Oguma should be suppressed as a synonym of it. I also ascertained in 1935 that the female of unifasciatus Oguma is an entirely different species, which is now treated as Trigomphus citimus tabei Asahina (1949) .