Color of body, number | Hairs present on back | Head projections | Length mm, pronotum front - elytra rear

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Number scored for a state is in green.

1. Length mm, pronotum front - elytra rear

35Under 10    1110-17    1Over 15, average 20   

2. Color of body, number

341    15More than 1   

3. Head projections

16None    2One cross ridge    5Pair of protuberances    4Single horn    6Single protuberance    1Two bowed horns    13Two cross ridges    4Two straight horns   

4. Hairs present on back

26No    26Yes