26a (25). Stigmal vein with stigma subrectangular (Fig. A), elongated; pedicel of & antennae conspicuously more slender proximally (Fig. B); frontal grooves usually parallel (Fig. C); median area of & propodeum closed behind by fusion of the lateral and median folds (Fig. D); digitus of male genitalia subrectangular with 4-5 digital apical processes (sensilla basiconica) (Fig. E); male hind leg with 2 tibial spurs (Fig. F); hind leg with tarsal claw bearing >11 setae (Fig. G); specimens largest of the genus: female 2.84 mm, male 2.18 mm; biparental, solitary; [original range in western North America, probably established elsewhere through biological control effort]. ...........................................................................................................(Chalcidoidea) - Pteromalidae - Muscidifurax zaraptor Kogan & Legner 

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26b. Stigma not elongated, sometimes roundly clubbed (Fig. A); pedicel of & antennae not especially slender proximally (Fig. B); frontal grooves usually convergent (Fig. C); median area of & propodeum usually open behind, lateral and median folds not fused in middle (Fig. D); male digitus genitalia subtrapezoidal, broader distally; usually with only 3 apical processes (Fig. E); specimens usually small; biparental; avg. length of female 2.11 mm, male 1.82 mm [Peru race averages female 2.33 mm, male 1.83 mm]; frequently (at least 10%) or >80% gregarious; [original range in Uruguay, Chile & Peru (Peru race solitary); established in California & probably elsewhere through biological control effort]...............................................................(Chalcidoidea) - Pteromalidae - Muscidifurax raptorellus Kogan & Legner 

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