The systematic placement of the genera in the subfamilies Eulophinae and Euderinae of the Eulophidae (Hymenoptera: Chalcidoidea) of North America were reviewed. Two new genera are described: Cristelacher and Dasyeulophus. Thirty genera are included in the Eulophinae and five in the Euderinae. Four new generic synonymies are proposed in the Eulophinae: Notanisomorpha Ashmead = Hemiptarsenus Thomson; Mirolynx Girault and Pseudolynx Girault = Aulogymnus Forster; Cirrospiloideus Ashmead = Elachertus Spinola. One new generic synonymy in the subfamily Entedoninae is proposed: Aabacharis Schauff = Eprhopalotus Girault. Nine genera are recorded from North America for the first time: Colpoclypeus Lucchese, Cristelacher Schauff and LaSalle, Gen. n., Dasyeulophus Schauff and LaSalle, Gen. n., Deutereulophus Schulz, Diglyphomorpha Ashmead, Euplectromorpha Girault, Notanisomorphella Girault, Platyplectrus Ferriere, and Xanthellum Erdos & Nov. Thirty two new combinations are proposed and a lectotype is designated for Cirrospiloideus playnotae. A table of the genera of North American Eulophinae, with their current placement is given.