18 (17) Each elytron with 3 longitudinal vittae; 3.2-3.6 mm long, 



1.25-1.4 mm wide (Fig. 31): Stenelmis sexlineata 



Each elytron with no more than one vitta or elytron 



bimaculate 19 



19 (18) Humeral spot or vitta embracing vunbone of elytron 22 



Humeral spot or vitta on inside of sixth interval 20 



20 (19) Body very robust, and with the elytral spots or stripe 



wider, covering considerably more than the fifth 

 interval; third interval sharply elevated at base; 

 elytron with entire vitta or bimaculate; 3.0-3.35 mm 

 long, 1.2-1.35 mm wide (Figs 26, 32): Stenelmis orenata 

 Body very elongate, with the elytral spots or stripe 

 narrower, covering but little more than the fifth 

 interval; third interval but slightly elevated at base 

 and this elevation very short 21 



21 (20) Median lobe of aedeagus distinctly constricted at middle 



(Fig. 33); 2.85-2.9 mm long, 1-1.1 mm wide: Stenelmis exigua 

 Median lobe of aedeagus more nearly parallel (Fig. 34); 



3.2-3.4 mm long, 1.2-1.25 mm wide: Stenelmis heamevi 



22 (19) Vitta very broad and covering nearly all of the space 



between the first and sixth intervals; 2.65-3 mm 

 long, 0.95-1.1 mm wide (Fig. 35): Stenelmis lateralis 

 Vitta narrower and never extending medially beyond the 



second or third interval 23 



23 (22) Size larger: 3.2-3.6 mm; lower margin of last tarsal 



segment with a conspicuous angular process (Fig. 29) .... 24 

 Size smaller: 2.6-3.25 mm; lower margin of last tarsal 



segment without such a process (Fig. 27) 25 



24 (23) Apical abdominal emargination equal to width of last 



tarsal segment; tibiae testaceous only at base; elytron 

 bimaculate; 3.3-3.6 mm long, 1.3-1.5 mm wide: 



Stenelmis aoncinna 

 Apical emargination very inconspicuous and much less 



than width of last tarsal segment; tibiae and apices of 



femora testaceous; bimaculate; 3.2-3.5 mm long, 1.25- 



1.5 mm wide (Fig. 37): Stenelmis sandersoni 



25 (23) Basal tubercle of pronotum elongate and carinate 26 



Basal tubercle of pronotum only slightly elongate 



and never carinate 27 



30 



