28a (27). Spiracle of & propodeum more removed from lateral median fold than in couplet 28b (Fig. A); spiracular ridge as long as larger diam. of spiracle; stigma of forewing distinctive (Fig. B); avg. length of female 2.15 mm, male 1.61 mm; uniparental (although male often appear in culture in high ratios), digitus of these male with 4 apical processes (Fig. C); solitary parasitoid; [original range Puerto Rico, established in California and probably elsewhere through biological control effort]..Chalcidoidea) - Pteromalidae .. Muscidifurax uniraptor Kogan & Legner

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28b. Spiracle of & propodeum normally removed (= distant) from lateral median fold (Fig. A); spiracular ridge shorter than diam. of spiracle; stigma on forewing formed as a gradual dilation of tip of stigmal vein and uncus is direct distally (Fig. B); digitus of male with 4 apical processes (Fig. C); avg. length of female 2.31 mm, male 1.78 mm; biparental, solitary parasitoid; [original range in Central America & Southern Mexico]................…..................................................................……… Chalcidoidea) - Pteromalidae - Muscidifurax raptoroides Kogan & Legner

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