Subgenus Allopsithyrus Popov in Böhmen und Mähren. (Hym. Apid.). Subgenus Allopsithyrus v Čechách a na Moravě
May J.
Acta Entomologica Musei Nationalis Pragae 20: 223-231, 1942
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Key words: Allopsithyrus, Apididae, Hymenoptera, Czechoslovakia, Palaearctic, distribution, diagnosis