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Life history studies on Aphelopus species (Hymenoptera, Dryinidae) and Chalarus species (Diptera, Pipunculidae), primary parasites of typhlocybine leafhoppers (Homoptera, Cicadellidae)

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A new key for the identification of British species of Aphelopus (Hym: Dryinidae)

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Distribution and density of nests of Myrmica schencki Emery in a sandy heath area in Jutland, Denmark

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Note sur les Hylaeus de l’île d’Oleron, avec la description d’une espèce nouvelle (Hym. Apidae)

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Evolution of Instinct. Comparative Ethology of Hymenoptera

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Recherches sur les Hyménoptères nidifiantes aphidivores III

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Worker reproduction and social hierarchies in Leptothorax ants

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Ceropales variegatus, F., in the New Forest

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Andrena hattorfiana, Fab., and Nomada armata, H.-Schff., near Oxford

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The Hymenoptera Aculeata of Glamorgan

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