A key to the European species of the Pteromalus altus group is presented. The relationship between this group and species of the genus Euphorbia (Euphorbiaceae) is confirmed. One new species: P. villosae, associated with Euphorbia villosa Waldst. & Kit.is presented. Two new species of the albipennis group: Pteromalus almeriensis and P. costulata are presented. In addition one species of the P. vibulenus group: P. tethys is added. Information on P. sylveni Hedqvist, P. osmiae Hedqvist and P. discors Graham is given.

Chalcidoidea, Pteromalidae, Pteromalus, new species, redescriptions, Spain, Portugal, France, Greece, Euphorbia
Zoologische Mededelingen

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Naturalis journals & series

Gijswijt, M.J. (1999). Four new species of Pteromalus Swederus (Hymenoptera: Chalcidoidea: Pteromalidae) and redescriptions of three other species. Zoologische Mededelingen, 73, 1-11, 165–175.