122a (121a).    Abdominal terga 2 & 3 not fused (Fig.A) (parasitoids of aphids) ..........(Hymenoptera) 
      
……………………………………....................….. (Ichneumonoidea)  Braconidae  (Aphidiinae)
 
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                                       A
 
 
122b.    Abdominal terga 2 & 3 fused or the cubitus (= longitudinal
vein just posterior to medial)
             in fore wing
arises from the radial cell (Figs.A-F) (parasitoids
of many kinds of hosts,
               excluding aphids)
......................................................(Hymenoptera)  (Ichneumonoidea)  Braconidae
 
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                               A                                       B                                         C                                           D
 
                                                                       E                                      F