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Key to the Families of Proctotrupoidea

& Platygastroidea


(Derived primarily from Gauld & Bolton 1988)


(Email Contacts)



[This key is in a form commonly used in North America.  If the statement is true, proceed to

the designated couplet, whereas if it is false, go to "b" portion of the couplet].


[Please refer to <Guide> and <Taxnames> for illustrations]




1a.  Antennal sockets contiguous with dorsal margin of clypeus or separated from clypeus by less than diameter of socket



1b.  Antennal sockets separated from dorsal margin of clypeus by more than diameter of socket



2a.  Fore wing with well developed venation, marginal cell closed and a distinct pterostigma present; antenna with 13 segments .......... Vanhorniidae   <Habits>; <Adults> & <Juveniles>



2b.  Fore wing with very reduced venation, without a closed marginal cell or a distinct pterostigma; antenna with 12-14 or less segments



3a.  Fore wing without stigmal or postmarginal veins, often veinless; antenna with 10 or fewer segments; males with antennal segment 4 or 3 specialized ......... Platygasteridae   [Now in Platygastroidea]   <Habits>; <Adults> & <Juveniles>



3b.  Fore wing with stigmal and usually also postmarginal veins present; antenna usually with 11-12 segments, rarely with 10; males with antennal segment 5 specialized ........ Scelionidae  [Now in Platygastroidea] <Habits>; <Adults> & <Juveniles>



4a.  Scape distinctly elongated, at least 2.5X as long as wide; pterostigma absent; antennal shelf usually present  ........... Diapriidae   <Habits>; <Adults> & <Juveniles>



4b.  Scape at most 2.2X as long as wide, usually less; pterostigma present; antennal shelf absent



5a.  Antenna with 15 segments and one ring-like segment; fore wing with a distinct triangular cell 1M; claws comb-like .......... Heloridae   <Habits>; <Adults> & <Juveniles>



5b.  Antenna with 13 segments; fore wing without a triangular cell 1M; claws not comb-like.......... Proctotrupidae   [Formerly Serphidae]   <Habits>; <Adults> & <Juveniles>




    Monomachidae <Habits>; <Adults> & <Juveniles>

          [formerly Monoserphidae <Habits>; <Adults> & <Juveniles>]


    Pelecinidae <Habits>; <Adults> & <Juveniles>


    Peradeniidae <Habits>; <Adults> & <Juveniles>


    Roproniidae <Habits>; <Adults> & <Juveniles>


    Serphidae (now with Proctotrupidae) <Habits>; <Adults> & <Juveniles>