258a (257b). Antennal insertion definitely more than one socket diameter above free margin of clypeus;

if doubtful, then either eyes diverge ventrally or side of head ("cheeks") ridged (= carinate)

..................... (Fig.A).. .260

 

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A

 

 

258b. Antennal insertion less than one socket diameter above free margin of clypeus; if

doubtful, side of head without ridges (Fig.A)............................................................................. 259

 

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A