The magnificent tick collection in the British Museum (Natural 

 History) was studied during the stunmers of 1951 and 1952 and early 

 in 1955 fiirther to investigate taxonomic problems and to extract 

 pertinent unpublished data (Hoogstraal 195-40). Africsin collections 

 have also been identified for the Chicago Natioral History Museum, 

 Museum of Comparative Zo'Slogy at Harvard University, and several 

 other institutions. During the sumnBr of 1952, visits were made 

 to the following institutions for the purpose of checking and ac- 

 quiring information: Museum of Comparative Z.oologj', United States 

 National Musetun, and Rocky Mountain Laboratory at Hamilton, Ibntana, 



Another visit to Equatoria, Bahr El Ghazal, Blue Nile, and 

 Khartoum Provinces was made in November and December of 1952 to 

 search for Ornithodoros ticks and to collect living ticks and human 

 blood sera for comparative virus and rickettsial investigations. 

 In February of 1953, I visited the Sudan Veterinary Servicers "'Jur 

 Narrows game eviction project'" in the GaluaL-Nyang forest area of 

 Bahr El Ghazal Province and obtained a number of valuable records 

 from this area. 



During the winter of 195A-1955, I was fortunate to be able to 

 visit a ntunber of institutions for final studies and conferences in 

 connection with the preparation of this report. Chief among these 

 were: The Rocky Mountain Laboratory; Camp Dietrick, 14aryland; 

 Animal Parasite Laboratory of the United States Department of Agri- 

 culture at Beltsville; Zoology Department of the University of Mary- 

 land; United States National Ifuseum; Bureau of Medicine and Surgery 

 of the Navy Department at Washington, D.C.; British Ituseura (Natural 

 History); London School of Hygiene and Tropical Medicine; King's 

 College of the University of London; and Tring Museum. 



At variovis times throi:ighout this period of study I have been 

 privileged by the United States Navy to visit other areas for ob- 

 taining comparative materials for this study. In addition to ex- 

 tensive searching in Egypt, including Sinai and the Sudaxi frontier, 

 trips for this purpose have been undertaken in Kenya, Uganda, Tanga- 

 nyika, Belgian Congo, Eritrea, French Soraaliland, Yemen, and Turkey, 

 A U.S. Navy-Smithsonian Institution collaborative project is at 

 present -underway in Lib^-a. 



A brief preliminary report of this work has been published 

 (Hoogstraal 1954B) and three new species found in the Sudan during 

 this survey have been described (Hoogstraal 1955B,1956A, ). 



_ 18 - 



