Notwithstanding their wide distribution and domestic habitats, 

 R. sangirineus populations vary considerably in density from one area 

 To another. This tick gradually increases in number from southern 

 Sudan, where it is frequently encountered but seldom exceedingly 

 numerous, through central and northern Sudan to Lower Egypt in 

 which areas it is usually a most ubiquitous pest. Although this 

 picture appears to contradict the tick's preference for a warm, 

 humid climate, it is undoubtedly influenced by human cultiiral 

 patterns, man-made microhabits such as buildings and irrigated 

 fields, and concentration of human and animal populations. 



The known distribution of R. sanguineus up to January 19^9, 

 has been mapped by Leeson (I95l7. African areas left unmarked 

 on this map are far too extensive. The American Geographical 

 Society's (19$/|.) map of the distribution of the kennel tick also 

 contains many gaps in Africa as well as in other parts of the 

 world where this tick exists. A literature svirvey and examina- 

 tion of British Museum (Natural History) collections, the Onder- 

 stepoort records, and oTir collection shovjsthat this species is 

 present almost everywhere in Africa except possibly in the most 

 extreme situations of the great deserts of northern and southwest- 

 ern Africa and perhaps in a few of the most isolated oases. 



The following distributional records are for continental 

 Africa, its outlying islands, and that part of Arabia within the 

 E^thiopian Faunal Region, only . 



NCmTH AFRICA ; EGYPT (As Ixodes linnaei ; Savignyi 1826 and 

 Audouin 1827. Efeumann 1901,1911. Donitz 19O5,1910B. Samson 

 1908. Mason 1915,1916. Nuttall 1915. Bodenheimer and Theodor 

 1929. Carpano 1936. Said 19A.8. Hoogstraal, Wassif, and Kaiser 

 1955. Hurlbut 1956). 



LIBYA (Franchini 1927, 1928, 1929A,B. Tonelli-Rondelli 1930A, 

 1932D. Giordano and Nastasi 1935. Giordano and Giordano 1935, 

 Garibaldi 1935, Stella 19380, Enigk 19A3. Bartone 1950). 



TUNISIA (Neumann 1911. Galli-Valerio 1911A. Chatton and 

 Blanc 1916a, 8,1917,1918. Brumpt 1919. Durand and Conseil 1930, 

 1931. Durand 1931,1932A,B. Anderson 1935. Anderson and Sicart 

 1937. Alexander, Mason, and Neitz 1939. Colas-Belcovir and Rageau 

 1951). 



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