DISEASE RELATIONS 



MAN ; Tick paralysis (toxin or venom). Q fever (Coxiella 

 burnetii ). 



CATTLE ; Sweating sickness (virus). Lameness and paralysis 

 in calves ^toxin or venom) . 



SHKFIP ; This tick may be associated with footrot of sheep, 

 a secondary infection by bacteria, and lesions from its bites 

 may lead to lameness. 



HORSES ; Not a vector of horsesickness (virus). 



NOTE ; This species should be considered as strongly suspect 

 in the transmission of rickettsial organisms among domestic and 

 wild animals. 



REMARKS 



A somewhat deformed specimen of H. truncatum has been des- 

 cribed and sketched by Santos Dias (l^ATB) and another (as H. 

 savignyi ) by Tendeiro (195IF). ~ 



In various papers by E. A. Lewis on work in Kenya, based 

 largely on H. truncatum (cf. Hoogstraal 195'iC), the author refers 

 to rearing experiments by Nuttall (1913) and Fatten and Cragg 

 (1913) as being accomplished with the same species. Since 

 Nuttall*s material originated in Algeria and Patton and Cragg's 

 in India, these workers obviously utilized different species. 

 The material used by Nuttall, now in British Museum (Natural 

 History) collections, reported as H. aegyptium , is H. margina - 

 tum . ~ "" 



The 4500 specimens of H. truncatum from throughout Africa 

 that have been examined for the present study are highly 

 distinctive and show considerably less variation than en- 

 countered among most other species in this genus. This ob- 

 servation is diametrically opposed to Feldman-Muhsam' s (195A-) 

 remarks; ''Examination of laboratory- bred material 



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