BY THOMAS G. SLOANE. 451 



a. Anterior tibiae with second external 

 tooth not nearer apex than where 

 inner apical spine rises. (Apex of 

 intermediate tibiae wide, a strong 

 acute long spur projecting outward 

 from just above apex ; the external 

 edge armed with two short, promi- 

 nent, acute teeth above the apical 



spur) Sc. laticollisy Macl. 



aa. Anterior tibiae with second external 

 tooth nearer apex than where inner 

 apical spine rises. 

 h. Lateral border of elytra not form- 

 ing a thickened fold at humeral 



angles Sc. pacificus, SI. 



bb. Lateral border of elytra folded over 

 and thickened at humeral angles, 

 c. External apical spur of inter- 

 mediate tibiae obtuse. 

 d. Pre-ocular sulcus deeply 

 marked, a strong sinuosity 

 between it and anterior 



angles of head Sc. assimiliSj SI. 



dd. Pre-ocular sulcus deeply 

 marked, no sinuosity be- 

 tween it and anterior angles 



of head Sc. crenaticoUis, Macl. 



cc. External apical spur of inter- 

 mediate tibiae acute. 

 e. Post-ocular prominences pro- 

 jecting strongly outwards 

 beyond the eyes, their 

 anterior margin truncate. . Sc. rotundi2:>ennis, Dej. 



