BIOLOGY 



Life Cycle 



The developmental periods iinder summer laboratory conditions 

 have been reported by Theiler and Robinson (1953B) to be: 



PERIOD DAYS 



Preoviposition to larval hatching 14\ 



Larva feeds 3 to 5 



Postfeeding period 8 to 18 



Nymph feeds 5 to 16 



Adults did not attach. The ]aboratory hosts were guinea pigs 

 (Theiler, correspondence). 



Ecology 



Unstudied. 



DISEASE RELATIONS 

 Unstudied, 



REMARKS 



Zumpt (19/+2B) included R, sulcatus in the R. capensis group, 

 which is represented in the Sudan also by R, longus (see page 665) 

 and R. supertritus , ~ 



The original specimens of R. sulcatus are in collection nxmu 

 ber L439 of the Veterinary School of Toulouse. 



Santos Dias (1952H) considers R, sulcatus Neimann, 1908, to 

 be a synonym of R. sanguineus punctatissimus Gerstacker, 1873, 

 which Zvimpt (195^A) considers to be a synonym of R. s. sanguineus. 

 Inasmuch as the original description of R. sanguineu's punctatis - 

 simus is not sufficiently detailed satisTactorily to settle this 

 question, and the type specimens have not been examined by Santos 



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