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The rove beetle genus Drusilla includes some myrmecophilous species. The Japanese species Drusilla sparsa (Sharp, 1874) has been regarded as a non‐myrmecophilous beetle. In Kagawa Prefecture, Shikoku Island, western Japan, however, we often observed that D. sparsa adults were walking in the vicinity of foraging workers of the myrmicine ant Crematogaster osakensis Forel, 1990. The body color of the...
I studied the myrmicine ant Myrmecina sp. A in West Java, Indonesia, which had the obligately myrmecophilous oribatid mite Aribates javensis in its nests. The oribatid mites cannot survive without ant attendance. The ants rarely eat living mites, but they feed on the mites in case of food shortage and after death of the mites. I examined the effects of the oribatid mites as food on the host ants....
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