| 1 | Epipharynx with six mastoids above the basal spines | 2 |
| – | Epipharynx with eight mastoids above the basal spines | Itagonia |
| 2 | Urogomphi conspicuous | 3 |
| – | Urogomphi inconspicuous | Gnaptorina |
| 3 | Labrum with not less than 6 setae on apical part | Blaps |
| – | Labrum with less than 6 setae on apical part | Prosodes |
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