1	Metasoma with a syntergite (sometimes with second tergite separate as a small anterior ring, but no posterior tergites visible normally) (a). Two apical segments of female antennae immovably conjoined (b). Wing veins do not reach wing edge (a)	2
–	Metasoma with posterior tergites visible (A). The two apical segments of antennae always movable (B). Wing veins reach wing edge	3
2	Second tergite separate as a small anterior ring (a). Scutellum laterally smooth; apical ridge small (b). Subcosta running near wing edge. Common	Dilyta
–	Second tergite merged with syntergite (A). Scutellum with lateral ridges (B) and pronounced apical ridge (B). Subcosta running near middle of wing. Rare	Apocharips
3	With mesopleural line (a). Variable but usually more “figitid-looking”, darkly colored, with a long marginal cell (b)	Phaenoglyphis
–	Without mesopleural line (A). Usually tiny, pale, with a short marginal cell (B)	Alloxysta