315a (314b).    Scutellum with obvious paired bristles, at least 2 frenal ones
present in posterior
             corners (Figs.A-B), often with additional pairs on scutellum or even
posteriorly on
             scutum; antennae inserted low on face, sockets rather
far apart (Fig.C); body mostly not
              metallic............................................................................................................……...................................
316 
 
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                                         A                              B                                   C
 
315b.    Scutellum without any pairs of obvious bristles, thorax
generally either with rather regular
             hairiness or almost bare; in
other respects also partly
different........................…...........…............ .317