256a
(254a).    Mesopleuron concave;
midtibial spur thin and like a spine (Fig.A).......……......................
257 
 
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                                                          A
 
 
256b.    Mesopleuron convex (bulging); midtibial
spur relatively thick (Fig.A)...........……....................... 283 
 
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                                                         A