120 
Dorsal scutum with mixed punctation, regularly distributed 
— R. sanguineus. 
Dorsal scutum with medium-sized uniform punctations between 
the marginal grooves, rare in their neighbourhood, none 
on the edge, large ones on the scapular angles 
R. longus. 
(Anal shields with a single (or principal) internal point. 13. 
I2 ' 1 Anal shields with an external point. R. lunulatus. 
/Coxae I, without visible prolongations from the dorsal 
J surface ; adanal shields with two points. R.armatus. 
| Coxae I, with prolongations visible from the dorsal surface; 
adanal shields with one point. R. duttoni. 
