Man: Several specimens from Kataguna and Katagum, Nigeria, 

 and from Kenya in BMNH collections (HH det.). 



Immattire Stages 



Nymphs on dogs and hedgehogs (Rousselot 1951) . Larvae and 

 nymphs sometimes on cattle, sheep, and goats (Fotheringham and 

 Levas 1937). Nymphs on hares (Wilson 19/^6,1950B, Sousa Dias 

 1950. Fiedler 1953). Lajrvae from a hornbill, Tokus flavirostris 

 leucomelas (Santos Dias 1952D). "ImmatVLres" from a pied crow, 

 Corvus albus albus in Transvaal (Theiler, correspondence). 



BIOLOGY 



Life Cycle 



Unstudied. Wilson (1946) was unable to rear this species 

 in Nyasaland. 



Ecology 



The African hyalomma, another xerophilic member of this 

 genus, obviously differs somewhat from H. rufipes in ecological 

 requirements but the limiting factors exe not yet recognized 

 clearly enough for proper elucidation. As stated above, the 

 distribution of H. truncatum is strictly limited to the Ethio- 

 pian Faunal Region and its range is widespread and fairly 

 continuous within these confines except in heavily forested 

 and high rainfall areas. Wilson (1953) includes H. trimcatTjm 

 in the A. gemma - R. pravus (= R. neavi) association (see page 

 ) that occurs wTiere annual r'ainfall seldom exceeds 25 inches. 



In southern Africa (Theiler 1956) , the range of H. trunca- 

 tum differs from that of H. rufipes in that the former is absent 

 at higher elevations with" high rainfall but present in cooler 

 lowland winter rainfall areas. In regions with 25 inches of 

 annual rEiinfall populations are rare and isolated. In Equator- 

 ial Africa, however, the African hyalomma does tolerate this 

 and a slightly higher range of rainfall (HH). Here a combina- 

 tion of factors including higher temperatures, long dry seasons. 



- i!^99- 



