Veterinary Service, who canvassed his field officers for specimens 

 for distributional records and who invited us to study parasitolo- 

 gical aspects of the Jur Narrows Game-EJviction Project; to Mr. 

 John Owen, formerly District Commissioner, Torit, for many courte- 

 sies and a number of worthwhile specimens; to Mr. H. B. Luxmoore, 

 formerly Equatoria Veterinary Inspector, who was especially help- 

 ful in providing ticks from livestock and facilities for obtaining 

 additional such specimens; to Mr. T. W. Chorley, formerly Tsetse 

 Control and Reclamation Officer, Sudan Veterinary Service, our 

 cooperative and indefatigable host on the trip to Jur Narrows; 

 to Mr. E. T. M. Reid and others of Mr. Chorley »s staff (page 808) 

 for special efforts to collect ticks and data; and to Bimbashi 

 Hillory Hook, formerly of the Stdan Defense Force, for a nuniber 

 of fine specimens from a variety of big game. 



Special acknowledgement is made to n^^ assistants. Chief Hos- 

 pital Corpsman Deaner K. Lawless, USN, and Mr. Richard Alison, 

 for help in collecting specimens in 194-8. 



While studying collections at British Museum (Natural History) 

 I was the recipient of many kindness and courtesies from Mr. E. 

 Browning and Dr. G. Owen Evans, for which hearty thanks are ex- 

 pressed. The privilege of being permitted to identify literally 

 thousands of unnamed African ticks in British Musevun (Natural 

 History) collections has provided excellent background material 

 for many phases of this report. 



In the course of this work, it has been our privilege to have 

 outstanding parasitologists and specialists review parts of the ma- 

 nuscript and offer comments and suggestions. In addition to Dr. 

 G. Theiler, Miss J. B. Walker, Mr. Glen M. Kohls, and Dr. C. B. 

 Philip, it is a pleasure to note the cooperation of Dr. P. C. C. 

 Garnham of the London School of Hygiene and Tropical Medicine; 

 Dr. G. E. Davis and Dr. W. Bvirgdorfer of the Rocky Mountain Lab- 

 oratory (on Ornithodoros moubata ) ; Dr. L. Delpy of Paris (on 

 Hyalomma , in early stages of manuscript); and Dr. D. R. Arthur 

 of the University of London (on Ixodes ). Dr. A. C. Chandler of 

 Rice Institute and Commander T. K. Ruebush, Office of Naval Re- 

 search, kindly reviewed extensive parts of this report during 

 its preparation. 



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