| Gena in dorsal view | as long as eye width | 0.8× as long as eye width |
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| Head in dorsal view | very strongly prominent between antennal | weakly prominent between antennal bases |
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| bases | |
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| Malar space | 1.0–1.2× as long as basal mandibular width | somewhat shorter than basal mandibular |
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| | width |
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| Flagellum | mid flagellomeres subsquare, subapical flag- | mid and subapical flagellomeres more or less |
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| ellomeres distinctly transverse | elongate |
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| Vertex | with very dense but shallow punctures on | impunctate or with very fine and sparse punc- |
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| strongly granulate background | tures on finely granulate background |
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| Clypeus | with dense punctures in upper half | with sparse or moderately dense punctures in |
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| | upper part |
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