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[文献書誌] Kojima,J.& Tsuchida,K.: "Oviposition and queen manipulation by swarm workers of an Australian swarm-founding paper wasp, Ropalidia romande (Le Guilloa)"Entomological Science. 3(1). 65-72 (2000)
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[文献書誌] Tsuchida,K.,Ito,Y.,Katada,S.kojima,J.: "Genetical and morphological colony structure of the Australian Swarm-founding polistine wasp, Ropalidia romandi (Hymenoptera, Vespidae)"Insectes Sociaux. 47. 113-116 (2000)
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[文献書誌] Kojima,J.: "Affinities of Australian paper wasp, Ropalidia proletaria, with descriptions of males, mature larvae, and a nest."Species D.versity. 5. 381-390 (2000)
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[文献書誌] Kojima,J.: "Notes on "types" of the Australian species of the Ropalidia interrupta complex (Hymenoptera : Vespidae : Polistinae)"Australian Entomologist. 27. 33-36 (2000)
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[文献書誌] Kojima,J.: "Taxonomic notes on types of the social wasp tribe Ropalidiini housed mainly in the Museum d'Histoire Naturelle, Geneve"Natural History Bulletin of Ibaraki University. 5. 1-22 (2001)
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[文献書誌] Kojima,J.: "Ropalidia wasps in New Guinea and its adjacent islands (first part)"Natural History Bulletin of Ibaraki University. 5. 31-60 (2001)