Abstract
The Japanese species of the genus Tmesiphorus are revised: three known species are redescribed and two new species are described. They are: Tmesiphorus costatus Weise, T. crassicornis Sharp, T. princeps Sharp, T. kinomurai sp. nov., and T. okinawensis sp. nov. A key to species is provided. Four species, T. crassicornis, T. princeps, T. kinomurai sp. nov. and T. okinawensis sp. nov., are recognized as obligate myrmecophiles.
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