Annals of tile Transvaal Museum. 
117 
very large ones in the median area and near the anterior margins, in this 
resembling sanguineus , hut, unlike sanguineus , the shield is as wide as 
long. 
R. capensis closely resembles evertsi, except that the eyes are hat, 
marginal grooves well developed, and a few large punctuations in the- 
anterior part (IX, c). 
R. sanguineus has a shield much longer than wide and very narrowly 
rounded behind. The eye's are situated near the posterior third of the 
length. The punctuations are mostly fine, and distant, on the whole 
surface of the shield. In the median area, the base of the marginal 
groove, and the marginal areas, are a few irregularly distributed very large' 
punctuations (IX, e). The doubtful species punctatissimus is probably 
synonymous with sanguineus, as all the characters agree. 
In appendiculatus, the shield is slightly longer than wide, but not so 
noticeably so as in sanguineus. The eyes are at about the middle of the 
length or the shield. The' fine punctuations are larger than in sanguineus , 
and thickly distributed over all the surface, except in an area on each 
side near the eyes, where they are fewer in number. The large punctua- 
tions are mostly confined to the anterior and lateral portions of the 
shield. The porose areas on the base of the rostrum are separated by 
more than their diameter, thus separating them from sanguineus, where 
these porose areas are only about a diameter from each other (IX, cl). 
In Imrsa the dorsal shield is plainly as broad, or broader, than long,, 
and hexagonal in outline. The punctures are equal, fairly fine, and evenly 
distributed over the whole surface ; the porose areas in the rostrum are- 
also separated by more than their diameter. 
In simus the shield is as wide as long, with the sides rounded ; in 
fact it often appears nearly circular in outline. The colour is nearly 
black, instead of dark brown, the usual colour, and shiny as in the male. 
The fine punctuations are numerous, evenly distributed, and usually very 
fine and superficial, often scarcely visible. The large punctuations are 
very large and few in number, situated in the median area, at the bottom 
of the marginal grooves and in the anterior portions of the marginal 
areas. Both the cervical and marginal grooves are continued to the 
posterior margin of the shield, where tlie}^ meet (IX, f). 
In nitens we find a shield similar to that of appendiculatus. It is 
oval in outline, hut scarcely longer than wide ; the marginal grooves are 
very superficial. The punctuations are unequal, the small ones numerous 
and superficial, while the large ones are situated in the median area and 
near the anterior edges, and not so scattered as in appendiculatus. Like 
appendiculatus, the porose areas of the rostrum are separated by more' 
than their diameter. 
The females of lunulatus resemble those of simus, as regards the dorsal 
shield, which is, however, slightly more elongate, of a brown colour, and 
with the fine punctuations slightly larger and more prominent. The large 
punctuations are smaller than in simus, and not so numerous. The 
cervical and marginal grooves are not so long, and do not meet at the* 
posterior margin of the shield (IX, g). 
