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| SNAME | Demetrias marginicollis Bates, 1883 |
| JNAME | mizugiwaatokirigomimushi |
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Collection ground Kawakami gun, Okayama Pref. 1991/6/12 |
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| Distribution | Hokkaido, Honshu |
| Ecology | coast of river and marsh (Kasahara and Nishiyama 1990), reed community (Kasahara and Nishiyama 1990), reed community in river and marsh (Kasahara 1999) |
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| Remarks | Demetrias marginicollis Bates, 1883, Trans. Ent. Soc. Lond.: 285 (Japan: “Miyanoshita; Honjo; Nowata”) (Habu 1967b), Demetrias marginicollis Bates (Habu 1967b) |
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