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