Previous Step (2a)
3a Front of vertex, viewed from above, obtusely angulate; the median carina not projecting beyond sides; median carina of face, viewed in profile, slightly concave above base of antennae.
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3b Front of vertex, viewed from above, convex or rounded; the median carina projecting as a small tooth beyond sides; median carina of face, viewed from the side, distintly concave above base of antennae.
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