270a (268b).    Abdomen covered by first two dorsal plates (or seemingly
covered by single
             plate); prepectus often fused with side panel of
pronotum (Fig.A), if prepectus clearly
             separated than face with discernible supraclypeal area
and strong mandibles only 2-
             toothed (Fig.A); prescutal
sutures always complete; body short and squat; head with well defined 
             clypeus and at least 1 mandible
with 2 teeth; body metallic to black, thorax mostly with coarse hairy
             pits (Figs.B-C)......................……………………........ Hymenoptera.........Perilampidae  (Subfamilies:…..   271)
 
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                                                    A                                                   B                                    C
 
 
270b.    Abdomen with 3 or more readily visible dorsal plates; body
usually elongated; head
 variable but usually with inconspicuous
clypeus and small mandibles with 3-4 teeth;
 either prescutal sutures incomplete or
antenna with 13 segments (Figs.A-B)
 .......................................................................... Hymenoptera...........Pteromalidae...(Subfamilies 272 & 294)
 
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                                                                 A                                                              B