178 GEO. H. HORN, M. D. 



The followin<i- table will enable our species to be separated : 



Thorax wider than long, not narrowed at apex. 



Thorax reddish yellow with a discal black spot notatil.<!>. 



Thorax as long or longer than wide, narrower in front. 



Punctures of elytra separated by three longitudinal smooth intervals. .lufS^i'S. 

 Punctures of elytra dispersed. 

 Thorax red, elytra black. 

 Femora red. 



Thorax oval, not longer than wide, punctures numerous. Elytra very 



obliquely truncate, the outer angle spiniform novatus. 



Thorax oblong, longer than wide, punctures few and inconspicuous. Ely- 

 tra sinuously truncate, the angles not spiniform lepidiis. 



Femora black. 



Thorax oval, very nearly smooth. Elytra less obliquely truncate, the 



angles sometimes spiniform dolosus. 



Body and legs pale brownish testaceous. 

 Thorax coarsely punctured, a median smooth space only. Elytra obliquely 



truncate, both angles subspinous (l(?liilis. 



S. iiotatus Oliv. — Black, shining, thorax and under side of head reddish 

 yellow, the former with a large discal black spot, surface sparsely clothed with 

 short yellowish pubescence. Thorax broader than long, apex and base equal, sides 

 rather strongly arcuate, surface sparsely punctured at the sides. Elytra coarsely, 

 sparsely punctured, the punctures a little finer near the tip; apices separately 

 emarginate, both angles acute, the outer somewhat longer. Length .35-.4S inch ; 

 9-12 mm. 



In both sexes the prosternum is very sparsely punctate, in some speci- 

 mens nearly smooth. The antennae S are one-fourth longer, and those 

 of the female shorter than the body. The discal spot of the thorax is 

 sometimes wanting. 



Widely distributed in the Atlantic region. 



S. liigeiis Lee. — Black, shining, head and thorax above and beneath red, 

 surface sparsely pubescent, on the elytra arranged in stripes with the punctures. 

 Thorax oval, a little longer than wide, narrower in front, surface smooth, almost 

 without trace of punctuation. Elytra rather coarsely punctured^ the punctures 

 arranged in longitudinal spaces separated by smooth intervals; apices truncate, 

 the inner angle acute, the outer spiniform. Length .48 inch ; 12 mm. 



In the males the prosternum is smooth at middle, in front of each 

 coxa a more roughly punctured space not sharply limited. 

 Occurs in Texas. 



S. novatlisn.sp. — Black, moderately shining, thorax and femora red, sparsely 

 clothed with very short gray hair. Head entirely black, coarsely closely punctate. 

 Thorax oval, not longer than wide, narrower in front, sides moderately arcuate, 

 surface coarsely sparsely punctured except at middle of disc. Elytra coarsely and 

 moderately closely punctured, the punctures equal from base to apex; apices very 

 obliquely truncate, both angles spiniform, the outer longer. Metasternum at sides 

 coarsely sparsely punctate, abdomen sparsely punctate at sides. Length ..38 inch ; 

 9.5 mm. 



