1 Ocelli in a slightly acute to slightly obtuse triangle; frontovertex having piliferous punctures mostly separated by much less than their own diameters; eye moderately densely hairy; antennal scape rather strongly expanded below; fore-wings strongly infuscate beyond basal quarter; head a bright metallic green ……………. corvinus
1’ Ocelli in a decidedly obtuse triangle; frontovertex having piliferous punctures separated by about or more than their own diameters; eyes rather sparsely hairy; antennal scape moderately or rather weakly expanded below; fore wings no more than moderately infuscate beyond basal quarter; head a duller, dark green ……… 2
2(1) Smaller species of length about 1.3 mm; facial area margined by a rather sharp fold above; eyes moderately strongly hairy; antenna having F6 1.5x as broad as wide and club 1.6x length of its greatest breadth; scutellum about 0.1x broader than long; forewings rather weakly infuscate beyong basal quarter, the hairs on the area before the speculum only moderately stronger than those beyond …………..…… sheldoni
2’ Larger species of length about 1.5 mm; facial area margined by a blunt fold above; eyes shortly hairy; antenna having F6 2.5x as broad as long and club about 2.0x length of its greatest breadth; scutellum about 0.25x broader than long; fore wings moderately infuscate beyond basal quarter, the hairs on the area before the speculum much stronger than those beyond ………………………………………………………. inquisitor
Described Nearctic species and distribution
corvinus (Girault, 1915): CAN (AB, BC, NB, NS, ON, QC); USA (CA)
debarri Sun, 1998: USA (GA, SC)
inquisitor (Howard, 1881): MEX (Exact state unknown); USA (AZ, CA, MD, MN)
sheldoni Ashmead, 1900: CAN (AB, MT, ON, QC); USA (CA, NY, VA, WA)
Kerrich (1978) presented a key to the then known world species. The above key was taken directly from his, less the first 2 couplets (which separated two non-Nearctic species).
Ashmead, W. H. 1900. On the genera of the chalcid-flies belonging to the subfamily Encyrtinae. Proceedings of the United States National Museum 22: 323-412.
Girault, A.A. 1915. New genera of chalcidoid Hymenoptera. Journal of the New York Entomological Society 23: 165-173.
Howard, L.O. 1881. (In Comstock, J.H. Report of the entomologist for 1880). Report of the parasites of Coccidae in the collections of the U.S. Department of Agriculture Part III. Report. United States Department of Agriculture. Washington (Entomology) 1880: 350-372.
Kerrich, G.J. 1953. 1978. A revision of the dinocarsiine Encyrtidae with a study of the genus Pelmatencyrtus De Santis (Hymenoptera: Chalcidoidea). Zoological Journal of the Linnean Society 62: 109-159.
Sun, J., DeBarr, G.L., Berisford, C.W. & Schauff, M.E. 1998. Description of a new primary parasitoid, Zarhopalus Ashmead (Hymenoptera: Encyrtidae) of Oracella acuta (Homoptera: Pseudococcidae). The Canadian Entomologist 130:793-797.