PROC. ENTOMOL. SOC. WASH. 94(4), 1992, pp. 471^89 TAXONOMIC CHANGES IN NEARCTIC PTEROMALIDAE, WITH THE DESCRIPTION OF SOME NEW TAXA (HYMENOPTERA: CHALCIDOIDEA) S. L. Heydon and Z. Boucek (SLH) R. M. Bohart Museum, Department of Entomology, University of California, Davis, CA 95616 USA; (ZB) International Institute of Entomology, % Department of Entomology, The Natural History Museum, Cromwell Road, London, SW7 5BD England. Abstract.— Numerous taxonomic changes in the placement of Nearctic Pteromalidae are made, and five new species are described. New genera described include Ficicola Heydon (for Ormocems flora Girault) and Collentis Heydon (for Dipara latipennis Ash-mead); new species include Sphegigaster grisselli Heydon, S. schauffi Heydon, Amphi-docius schickae Heydon & Boucek, Tricyclomichus algonquinus Heydon, and Panstenon poaphilum Heydon. New generic synonymies include Apterolaelaps Ashmead with Dipara Walker; Parasyntomocera Girault, Stigmatocrepis Ashmead, Parecrizotes Girault, and Mesecrizotes De Santis with Gastrancistrus Westwood; Lophocomodia Ashmead with Psilocera Walker; Megatrydymus Girault with Acaenacis Girault; and Trimeromicrus Gahan with Zatropis Crawford. The current taxonomic status of Dipachystigma Crawford, Spalangiolaelaps Girault, Epipteromalus Ashmead, and Zatropis Crawford is discussed. New Nearctic distribution records for Melancistrus Graham, Ablaxia Delucchi, and Psi-lonotus Walker are published. New species synonymies and combinations are published for the generic synonymies listed above as well as for Cleonymus Latreille, Bairamlia Waterston, Macroglenes Westwood, Seladerma Walker, Sphaeripalpus Forster, Ablaxia Delucchi, Merisus Walker, Psilonotos Walker, and Tomicobia Ashmead. Key Words: Hymenoptera, Pteromalidae, Nearctic, fig, new genera and species, new synonymy, new combinations A study of the described species of Ne-lows that of Graham (1969), except that arctic Pteromalidae by the authors for a key genal concavity is used instead of genal hol-to the Nearctic genera has uncovered nu-low, the lower ocular line (abbreviated merous taxonomic changes that need to be LOcL) is an imaginary line across the face made before the key is published. Some of between the most ventral point of the orbits, these, including new synonymies and cor-club is used instead of clava, the elongate rections in the placement of genera and spe-raised sensilla on the antennal flagellar seg-cies of Nearctic Pteromalidae, are reviewed ments are called multiporous plate (abbre-in the present text. In addition, five new viated MPP) sensilla, the middle body tag-species of Pteromalidae representing un-ma including the thorax and propodeum is usual species or species belonging to genera called the mesosoma, and the gastral terga not yet recorded from the Nearctic region are numbered Tl-7 beginning with the first are described. tergite after the petiole. The following ab-Terminology in this paper generally fol-breviations are used: median ocellar di-
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