16. Scuttim with variable backgrotind of 

 irregularly scattered fine to medium 

 size punctations among which fewer 

 larger punctations are more or less 

 distinct; lateral grooves pronounced, 

 long; outline distinctly longer than 

 wide and with characteristically 



sinuous posterior margin R . S. SANGUINEUS 



Figures 291 and id9^ 

 and 295 and 296 



Scutum with scattered punctations not 



as above; lateral gixjoves short, 



poorly developed, or absent, never 



rectilinear or deep 17 



17. Porose areas large, circxilar or sub- 

 circular; interval between these areas 

 no greater than their diameter. Scutum 

 with widely scattered fairly large punc- 

 tations and moderate n\mber of superfi- 

 cial interstitials of variable size; 

 outline somewhat wider than long or 

 length-width ratio approximately equal; 

 lateral grooves short or indistinct; 

 cervical grooves shallow, indistinct, 

 may extend to posterior margin. 



(Rare) R. BEQUAgfTI 



Figures~251 and 252 



Porose areas small or moderate, inter- 

 val separating them greater than their 

 own diameter 18 



-597- 



