TICKS OF THE BELGIAN CONGO. 



321 



Two species of Dermacenior are recorded from tlie Congo : — 



(1) D. circumguttatus, Neumann, 1897. In the male the ornamentation consists 



of eight pale spots situated near the sides of the scutum. The female scutum 



bears three such spots (fig. 13). 



Fig. 13. Dermacenior circumguttatus, 



Neumann, 1897 ; $ and ^ scutums 



(Neumann, 1897). 



(2) D. rhinocerotis (de Geer, 1778). In the male the ornamentation consists of 

 large symmetrically disposed yellowish or brownish spots, one of which 

 conforms to the shape of a female scutum, other smaller spots occupy the 

 periphery and some of the festoons. In the female almost the entire scutum 

 is pale and two round red spots occur on the back behind the scutum 

 (figs. 14 and 15). 



Fig. 14. DermacentoT rhino- 

 cerotis (de Geer, 1778) (^ : 

 dorsum (Neumann, 1897). 



Fig. 15. Dermacenior rhinocerotis (de Geer, 1778) $ 

 scutum ; $ and ^ digits highly magnified 

 (Neumann, 1897).*^ 



