274a (273b).    Scutellum posterior without triangular "projection"
and with parallel dorsal
 grooves; ovipositor often protruding (Fig.A).......................................................................
...................................................................................... Pteromalidae  (Colotrechninae).... .[also see 294]
 
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                                       A
 
274b.    Scutellum posterior with triangular "projection" (is
part of metanotum) and without apparent dorsal 
grooves;
scapula extends backwards outside the rectangular outer corner of axilla,
axilla 2X as long 
as broad; mid
tarsus with 4 segments, unusually long (Fig.A), first
segment as long as rest; prepectus 
unusually
small ........................................................... Pteromalidae  (Macromesinae).... .[also see 294]
 
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                                       A