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Observations préliminaires sur la biologie d’Osmia (Chalcosmia) caerulescens L., (Hymenoptera, Megachilidae), pollinisatrice de la luzerne (Medicago sativa L.)

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Synopsis of Andrena (Andrena) of Japan (Hymenoptera, Andrenidae) Parts I & II

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Synopsis of Andrena (Micrandrena) of Japan

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Behaviour of usurping queens in colonies of the ant species Leptothorax nylanderi (Hymenoptera: Formicidae)

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Fauna Apoideorum Germaniae

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Die Bienen Frankens (Hym. Apid.). Eine ökologisch-Tiergeographische Untersuchung

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Über Entwicklung und Lebensweise der Bienengattung Halictus Latr.und ihrer Schmarotzer

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Third report of the Entomological Section. 1950

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The bees, wasps and ants (Hymenoptera, Aculeata) of Cambridgeshire

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Ejected dipterous prey of Metacrabro quadricinctus F. ( Hym., Crabronidae)

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