Taxonomic comments are made for new species and new names of butterflies which appeared in Matsumura's (1907, 1929) two works. Cyaniris dilectus hermonthis Fruhstorfer, 1909 and Celaenorrhinus sumitra ratna Fruhstorfer, 1908 are here proposed as protected names (nom. protect.) against Cyaniris tappanus Matsumura, 1907 and Notocrypta kawakamii Matsumura, 1907, respectively, although the exact synonymy of Notocrypta kawakamii Matsumura, 1907 and Celaenorrhinus sumitra ratna Fruhstorfer, 1908 remains unresolved. Cyaniris arisanus Matsumura, 1910, in the current status as Celastrina oreas arisana (Matsumura, 1910), is regarded as a junior synonym and a homonym of Cyaniris arisanus Matsumura, 1907. Ypthima motschulskyi formosicola Matsumura, 1929 presented as a replacement name for Ypthima formosana Matsumura, 1907 is treated as a junior synonym of Ypthima multistriata Butler, 1883 and Rapala nissa formosanella Matsumura, 1929 is sunk to a junior synonym of Rapala hirayamana Matsumura, 1926.
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