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Boophilus 292 



Introduction 292 



Key to geniis 295 



Boophilus annulatus 298 



Boophilus decolor'atus 306 



Notes on B. micro plus^ 319 



Dermacentor 325 



Introduction 325 



Key to Svidan species of Dermacentor 327 



Dermacentor c. circumguttatus 329 



Dermacentor rhinocerinus 333 



Haemaphysalis . TT 337 



Introduction « 337 



Key to Sudan species of Haemaphysalis 339 



Haemaphysalis aciculifer 34-5 



Haemaphysalis bequaerti 350 



Haemaphysalis hoodi hoodi 355 



Haemaphysalis houyi 360 



Haemaphysalis leachii leachii 363 



Haemaphysalis leachii muhsami 377 



Haemaphysalis par mat a 383 



Hyalomma 388 



Introduction 388 



Nomenclatorial background 388 



History •. 388 



Recent revisional and supporting stvidies 339 



Distribution in Africa 391 



Hosts and biology 393 



Disease relations 394 



Identification 396 



Key to Sudan species of Hyalomma 397 



Hyalomma detritum (including **H. scupense ) 402 



Hyalomma dromedarii 421 



Hyalomma excavatum . 436 



Hyalomma impeltatum 453 



Hyalomm.a i'lpressum 462 



Hyalomma marf^inatum 466 



Hyalomma ruf ipes . 480 



Hyalomma triJncatum 492 



* Non_Sudanese species. 



**Non_Sudanese "biological form" of H. detritum . 



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