Key to the Subgenera of Clinidium

Ross T. Bell


1.      Cleaning organ of anterior tibia entirely proximad to basal 
        articulation of tarsus. .....................................2

1'.     Cleaning organ more distal, basal articulation of tarsus 
        opposite its midpoint. ......................................4

2(1).   Tufts of minor setae present on antennal segments VII-X; 
        pronotum widest near middle; angular seta present; marginal 
        seta absent; intercalary stria ending blindly (except 
        C. halffteri and some C. guatemalenum).                      							
        ............................................C. (Mexiclinidium)


2'.     Tufts of minor setae present on antennal segments VI-X; 
        pronotum widest distinctly posterior to middle; either both 
        angular and marginal setae are present, or else both are 
        absent; intercalary stria not ending blindly posteriorly. ...3

3(2).   Parasutural stria complete anteriorly, reaching elytral 
        base; pronotum without setae. ..................C. (Protainoa)


3'.     Parasutural stria restricted to posterior half or fourth of 
        elytron; pronotum with marginal, angular setae. ...C. (Tainoa)


4(1).   With five striae excluding the marginal; inner intervals 
        strongly convex to costate; marginal groove of pronotum 
        double or single. .........................C. (Arctoclinidium)


4'.     With three or four striae excluding the marginal; inner 
        intervals not costate or scarcely so; marginal groove of 
        pronotum single. .......................C. (Clinidium s. str.)