few reliable biologicsLl data are available for African species. 

 Factors governing morphological and biological variations of H. 

 leachii subspp. pose an especially intriguing problem. " 



Medically, the only African haemaphysalid of known importance 

 is H. 1. leachii , a vector of boutonneuse fever (tick typhiis) of 

 man~an3 of maligneint jaundice of dogs. The same species may also 

 be a reservoir of (i fever. The high potential of H. bequaerti as 

 a medically importeint species has been recently siiggested and 

 others probably eventually will be incriminated in disease trans- 

 mission of academic or practical interest. 



- 338 _ 



