1	Left mandible with three teeth and right mandible with four teeth (Fig. 6); fore wing with marginal fringe except between marginal vein and wing apex; occipital carina transverse, closer to foramen than vertex; gaster mostly ovate (Figs 1, 5), slightly longer than broad	Dibrachys (Allodibrachys)...2
–	Both mandibles with four teeth (Fig. 21); fore wing without marginal fringe; occipital carina curving, closer to vertex than foramen; gaster spindle-shaped (Figs 15, 23, 33, 38), distinctly longer than broad	Dibrachys (Dibrachys)...6
2	Head in frontal view with gena almost straight and with lower angle of gena protruding beyond clypeal margin (Fig. 3)	Dibrachys hians
–	Head in frontal view with gena evenly curved and with lower angle of gena not exceeding clypeal margin (Figs 6, 12)	3
3	Stigmal vein longer than postmarginal vein; gaster 1.5 times as long as broad	Dibrachys koraiensis
–	Stigmal vein shorter than or at most as long as postmarginal vein; gaster at most 1.3 times as long as broad	4
4	Lower margin of clypeus not protruded, slightly emarginate in middle and without tooth (Fig. 6); head in dorsal view with POL 1.33 times as long as OOL	Dibrachys kojimae
–	Lower margin slightly protruded, emarginate in middle and with two obtuse teeth; head in dorsal view with POL more than 1.5 times as long as OOL	5
5	Marginal vein 1.5 times as long as stigmal vein; propodeum with plica complete and median carina only distinct basally	Dibrachys yunnanensis
–	Marginal vein 1.91 times as long as stigmal vein; propodeum with plica only conspicuous basally, median carina absent	Dibrachys kunmingica sp. n.
6	Antennae with three anelli; postmarginal vein very shorter than stigmal vein, at most half length of stigmal vein	Dibrachys golmudica sp. n.
–	Antennae with two anelli; postmarginal vein longer or slightly shorter than stigmal vein	7
7	Lower margin of clypeus broadly emarginate, without tooth; gaster 1.37 times as long as broad	Dibrachys braconidis
–	Lower margin of clypeus slightly protruding, emarginate in middle and with two blunt or sharp teeth; gaster at least 1.8 times as long as broad	8
8	Antennal insertion slightly above lower ocular line, antennal scape reaching lower margin of anterior ocellus	9
–	Antennal insertion place on lower ocular line, antennal scape not reaching lower margin of anterior ocellus	11
9	Fore wing with a yellowish-brown infumation behind marginal vein; propodeum with incomplete median carina; stigmal vein slightly longer than postmarginal vein; gaster slightly broader than thorax width	Dibrachys maculipennis
–	Fore wing immaculate, without any infumation; propodeum with complete median carina; stigmal vein as long as postmarginal vein; gaster narrower than thorax width	10
10	Antennal scape as long as eye height; head in frontal view 1.27 times as wide as high	Dibrachys qinghaiensis sp. n.
–	Antennal scape distinctly shorter than eye height; head in frontal view 1.15 times as wide as high	Dibrachys confusus
11	Lower margin of clypeus emarginate in middle and with two sharp teeth (Fig. 31); antennae with Fu1 to Fu4 slightly longer than its broad; head in dorsal view 1.8 times as wide as long; gaster 1.8 times as long as broad	Dibrachys liaoi sp. n.
–	Lower margin of clypeus emarginate in middle and with two blunt teeth (Figs 40, 45) ; antennae with Fu1 to Fu4 quadrate; head in dorsal view 2 times as wide as long; gaster 2 times as long as broad	Dibrachys microgastri