| Head | Median tubercle on clypeus low, indistinct | Median tubercle on clypeus distinct |
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| Elytra: Intercostal punctures | Distinct, more closely spaced | Less pronounced, shallow more widely spaced |
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| Elytra: even numbered costae | Smaller, more closely spaced out | Large, widely spaced out |
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| Parameres | Apex of each feebly sclerotised without distinct membranous projection (Fig. 12a) | Apex of each feebly sclerotised with distinct membranous projection (Fig. 15e) |
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| Narrower in lateral profile (Fig. 12b) | Broader in lateral profile (Fig. 15f) |
| Phallus | Anteromedially deeply concave, lateral protuberances prominent (Fig. 12d) | Anteromedially shallowly concave, lateral protuberances low (Fig. 15h) |
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| Apex pointed; margin straight (Fig. 13i) | Apex rounded; margin recurved (Fig. 16j) |
| Phallobasis (in lateral profile) | Small (Fig. 12c) | Larger (Fig. 15g) |
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