Catalog of hymenoptera in America north of Mexico - Krombein, Karl V. (Smithsonian Institution Press, 1979)

Catalogue de la bibliothèque - Bohnensieg, G. C. W. (Georg Carl Wilhelm), 1828 - (Héritiers Loosjes, 1885)

Catalogue of British fossorial Hymenoptera, Formicidæ, and Vespidæ, in the collection of the British museum - British Museum (Natural History). Department of Zoology. (Printed by order of the Trustees, 1858)

Catalogue of British Hymenoptera in the British museum - British Museum (Natural History). Department of Zoology. (Printed by the order of the Trustees, 1876)

Catalogue of British Hymenoptera in the British Museum. Part 1, Andrenidae and Apidae - British Museum (Natural History). Department of Zoology. (Printed by order of the Trustees, 1891)