Handbook of Nearctic Chalcidoidea

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scutellum with 1 pair of setae; submarginal vein with 2 setae; face usually with scrobal and facial grooves.

scutellum with 2 paris of setae (rarely 3 or more); submarginal vein with 3 or more setae (rarely with 1 or 2); face usually without distinct grooves.