"1991"^^ . "Pteromalus (Habrocytus ) solidaginis spec. nov. is described. The species was exclusively found on flowers of Solidago virgaurea." . . "Pteromalus (Habrocytus ) solidaginis spec. nov. is described. The species was exclusively found on flowers of Solidago virgaurea." . "Graham, M. & Gijswijt, M. 1991. A new species of Pteromalus (Hymenoptera: Chalcidoidea) from France, associated with Solidago virgaurea. Entomologische Berichten (Amsterdam), 51(11): 153-155." . "Graham & Gijswijt (1991)" . . . "1991"^^ . "Graham & Gijswijt (1991)" .