The montane masses consist of the horseshoe shaped Acholi- 

 Iraatong Mountains, the highest peak of which is Mount Kinyeti 

 (10,4.56 feet elevation). To the east, the Dongotona Mountains 

 that rise to 86O5 feet elevation have an isolated northwesterly 

 extension in the Lafit Hills. The more eastern Didinga Hills 

 with Mount Lotuke the highest point at 9169 feet elevation, 

 are carried to the northwest by the Boya Hills. The base of 

 these mountains in the plains is at an approximate altitude 

 of 2000 feet. The vertebrate and tick fauna of none of these 

 montane masses is well known. 



SUDANESE SAVANNAH DISTRICT 

 KAPOETA AREA 



Kapoeta Area, an extension of KaramDJa District of Uganda, 

 is characterized by three important species that are coranon here 

 but become less numerous westwards toward Torit, their western 

 boundary in southern Sudan. These are R. pravus , A. cohaerens , 

 and A. lepidum . Only the last named species is known to extend 

 nortliward into the Eastern Floodplain Area from where it fans 

 out and becomes quite common in the Central Raanlands. A number 

 of species present in adjacent Torit Area are not known from the 

 Kapoeta Area. The more intensive work in the Torit Area may 

 partially account for this disparity but the short grass scrub 

 aspect of the eastern plains and the long and intense dry season 

 are factors that may exclude many of these species. This is the 

 area of vast migrations of tens of thousands of game animals 

 from Upper Nile Province (Zaphiro 1%9), a spectacular phenomenon 

 that should be investigated for its significance in relation to 

 tick distribution. 



EASTERN FLOCDPLAIN AREA 



The pictxire of tick distribution in this Area is character- 

 ized by the presence of most of the widely ranging, common 

 tropical species of the Sudan plains and by the apparent ab- 

 sence of ntimerous more specialized tropical species and north- 

 em species. More extensive exploration is required before 

 the true composition of the tick fauna of this Area can be 

 evaluated. 



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