I 



NTRODUCTION 



OBJECT AND SCOPE OF THIS AND RELATED PROJECTS 



The primary objective of Volume I of this series of studies 

 is to present our research on Sudanese ticks, incliiding a critical 

 svirvey of published worldwide information concerning each species. 

 This has been attempted with reference to; (a) distribution in the 

 Sudan auid elsewhere, (b) hosts, (c) biology, and (d) identifica- 

 tion. The secondary objective is to provide a suitable background 

 for subsequent volumes presently in preparation. These studies 

 will include all economically important tick species of Africa and 

 all diseases and inj\iries associated with them. 



The present report is intended to seirve the tyro and specialist 

 alike, and should provide a sound sovirce of information for those 

 who compile textbooks and review literature. Special attention is 

 invited to the introductory paragraphs in section IV, pages U3 to 

 47 f in which presentation methods and handling of data are eluci- 

 dated, and to the fact that mention of disease relations herein 

 are merely cross-referencing for subseqxient volumes. 



It should be stressed that most tick species of known or poten- 

 tial medical or veterinary importance of the Ethiopian Faunal Region 

 (see Figure l) are found in the Sudan smd are treated in the present 

 report. Those few species that do not occur in the Sudan will be 

 treated in a forthcoming voltune, entitled '"The Economically Iraportant 

 Ticks of Africa,** Therefore, pertinent facts concerning all known 

 species of medical and veterinary importance of continental Africa 

 will be Tnclvided in these two reports. Also included in the forth- 

 coming volvune will be maps of the distribution of each species in 

 the Sudan, as well as in other African regions and elsewhere in the 

 world. Subsequent volumes will be entitled: '"Human Tick-Borne 

 Diseases and Injuries in the Ethiopian Faunal Regiori* and '"The 

 Biological Relationships of African Ticks and Veterinary Diseases,'" 

 Since a year or more will probably elapse between the publication 

 of each volume, additional material concerning species previoxisly 

 treated will be presented in each new section in an effort to bring 

 the pertinent information up-to-date, 



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