HYALCMKA. IMPRESSUM Koch, 18/!^. 



(Figures 17^ to 177) 



THE WEST AFRICAN HYALCMMA 



NOTE; In literature on African ticks various siibspecific 

 designations of H. impressiim apply actually to H. rufipes or to 

 H. trxmcatiim and are treated herein -under those~species. The "K. 

 ilumbeum impressvurf ' of Soviet workers is H. rufipes. Koch's "" 

 18/W.j descriptxons of H. impressum and oT H. rufipes clearly 

 distinguish these two species. 



I 



The H. impress\3m mentioned by Adler and Feldman-Muhsam 

 (l946,19/i-'S) for Palestine resulted from mistaken identity of H. 

 rufipes (Feldman-Muhsam 195A-), as did Delpy*s H. impressum ~ 

 (194dA,B) from Iran (Delpy 194-9A,B). The H. impressxrn of Schulze 

 (1918) , from a single specimen collected from a horse in Macedonia, 

 Greece, and presumed to have been carried there as a nymph on a 

 migrating bird, is questionable; this record was repeated by Panda- 

 zis (19^7). 



DISTRIBUTION IN THE SUDAN 



H. impressum is locally common on cattle in central Sudan 

 west of the Nile. Numerous males and fewer greatly engorged f e^ 

 males reach the Khartotim quarantine station on Darfur and Kordo- 

 fan cattle and many males are still attached when these cattle 

 reach the Cairo abattoir. The West African hyalomma is not known 

 to be established east of the Nile. 



Darfur ; Zalingei and Sibdo (common on camels and cattle, 

 also occurs on horses; SVS). 



Kordofan ; Delami (cattle; SVS) . El Obeid (camels, SVS) . 



/ "Khartoum ; See three paragraphs above_j7 



_ 462 - 



