DISEASE RELATIONS 

 Unstudied. 



RMARKS 



The Sudan material was identified by Dr. G. Theiler. Santos 

 Dias (1952H) has compared this species with R. serranoi . 



IDENTIFICATION 



The following diagnosis is taken from the original description 

 of this species. 



II 



Males are like those of R. muhlensi in that they possess a 



well developed dorsal projectTon of coxa I and have Ijjiteral grooves 

 indicated only by punctations. They differ fromR. niuhlensi in 

 that the scutal punctations are larger, the basis~capituli is 

 broader and has more acute lateral angles, the palpi are more 

 compressed, and the adanal shields and spiracular plates are 

 different. The middle festoons do not protrude j the postero- 

 median groove is narrow and long, the paramedian grooves are 

 elongate-oval, and all the grooves are reticvilate. Size is 

 2,25 ram, to 3.00 mm. long and 1.66 mm, wide; color light to 

 dark brown; shape convex. 



Female palpi are unustially triangular in combined appearance 

 when the mouthparts are tilted downwards. The basis capitvili, 

 about twice as wide as long, converges strongly anteriorly in 

 an extension of the same angle as the lateral margins of the 

 palpi. The scutum is slightly longer than wide and posterior 

 of the eyes is sharply narrowed to a comparatively long, nar- 

 rowly pointed, posteromedian angle. No lateral grooves are 

 present but the scutal periphery is raised and the cervical 

 fields depressed; the cervical grooves converge from the deep 

 anterior pits to the anterior third of the scutum and thence 

 diverge as shallow grooves extending almost to the posterior 

 margin. Scutal punctations are mixed, irregular, larger and 

 denser than those of the male in the centrel area but fewer 

 in lateral raised areas, 



Theiler and Zumpt (loc. cit.) also described and illustrated 

 the immature stages. 



_ 618 _ 



