BY THOMAS G, SLOANE. 109 



Table of Species known to me. 



My knowledge of the genus has l)ecome considerably increased 

 since I formerly published a tabular list of the species known to 

 me eleven years ago; it is, therefore, hoped the present table will 

 give a better idea of the relationship of the species. 



A. Elytra without widely placed punctures on lateral ) Sc. laticollis, Macl. 



and apical declivities i Sc. gigas, Casteln. 



AA. Elytra with widely placed punctures on lateral and apical declivities. 



B. Prothorax shortly but strongly sinuate on each side posteriorly, basal 



angles sharply marked, subrectangular (posterior marginal seta at 



basal angle); elytra with border wide at humeral angles, not folded 



over inwards, but with edge interrupted just behind shoulders to 



form a humeral prominence Sc lucidus, Chaud. 



BB. Prothorax not strongly sinuate on each side posteriorly, basal angles 



not sharply marked; elytra with border continuous, or folded over 



inwards at humeral angles. 



C. Elytra with border continuous, not folded over or thickened at 



humeral angles. 



D. Intermediate tibiae with external apical » Sc. silemis, Westw. 



tooth acute \ Sc. mastersi, Macl. 



DD. Intermediate tibiae with external apical tooth dilatate and 

 obtuse, 

 e. Elytra with lateral border wide at humeral angles and con- 

 tinued on to base; posterior tibiae hardly thickened at 



apex Sc. Lemmis, Westw. 



ee. Elytra with lateral border narrow and ending at humeral 

 angles; posterior tibiae with apex strongly produced and 



prominent externally Sc. pacificus, SI. 



CC. Elytra with border thickened and folded over inwards at 

 humeral angles. 

 F. Intermediate tibiae with external apical tooth dilatate and 



obtuse Sc. hirtipes, Macl. 



FF. Intermediate tibiae with external apical tooth acute 



Sc. rotimdipennis, Dej. 



Note. — Sc. bacchus, Westw., I do not know; it probably would 

 fall into section " D " of the table given above. Sc. heros, 

 Casteln., also unknown to me, seems allied to Sc. bacchus. Sc. 

 humeralis, Casteln., evidently should be placed with Sc. laticollis^ 

 Macl., differing apparently by '* the protuberance below the 



