Redefinition of the Genus Holcaeus Thomson (Hym., Chalcidoidea, Pteromalidae) with a description of a new genus and species allied to it

Wasps of the World: A Guide to Every Family

van Noort, S.; Broad, G.

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The Bees of Sussex

Power, J.

Price £27.00

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Hymenoptera: The Natural History and Diversity of Wasps, Bees and Ants

Marshall, S.A.

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The Ants of Central and North Europe

Seifert, B.

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Solitary Bees (New Naturalist 146 )

Benton, T.; Owens, N.

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Ichneumonid Wasps (Hymenoptera: Ichneumonidae): their Classification and

Broad, G.R.; Shaw, M.R.; Fitton, M.G.

Price £55.00