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List of type specimens of Drosophilidae (Diptera) in the collections of the Rijksmuseum van Natuurlijke Historie in Leiden
Vol 131, Page 1
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Biogeography of the cicadas of the island of Bacan, Maluku, Indonesia, with description of Diceropyga bacanensis n. sp. (Homoptera, Cicadidae)
Vol 131, Page 7
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Revision of the nominate subgenus Chalybion Dahlbom (Hymenoptera, Sphecidae)
Vol 131, Page 13
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Ecological classification of forest-dwelling Carabidae (Coleoptera) in the Netherlands
Vol 131, Page 65
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A synopsis of the species of Phyllocycla Calvert with descriptions of four new taxa and a key to the genera of Neotropical Gomphidae (Odonata, Gomphidae)
Vol 131, Page 73
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A revision of Palaearctic oxytorine genera. Part VII. (Hymenoptera, Ichneumonidae)
Vol 131, Page 103
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Indian species of the genus Corynoptera Winnertz (Diptera, Sciaridae)
Vol 131, Page 113
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Epigomphus gibberosus, a new species from Peru, with lectotype designations for the eligible species of the genus Epigomphus (Odonata: Gomphidae)
Vol 131, Page 135
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Revision des Dysderinae (Araneae, Dysderidae), les especes mediterraneennes occidentales exceptees
Vol 131, Page 141
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Taxonomy of the Ochyrotica connexiva group (Lepidoptera, Pterophoridae, Agdistinae)
Vol 131, Page 271
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Ochyrotica toxopeusi spec. nov. from Celebes (Lepidoptera, Pterophoridae, Agdistinae)
Vol 131, Page 285