Usui, T. and M. Hayashi (2010) New record of the water measurer Hydrometra
gracilenta (Heteroptera, Hydrometridae) from Japan. Jpn. J. Syst. Ent.,
16(2): 377-378./イトアメンボの新記録種.
Usui, T. and M. Hayashi (2010) New record of the water measurer Hydrometra
gracilenta (Heteroptera, Hydrometridae) from Japan. Jpn. J. Syst. Ent.,
16(2): 377-378./イトアメンボの新記録種.