horses and, to soma extent, sheep, ^^oats, and dors. Man is vn. 

 commonly attacked by adults, but more frequently hy larvae an,, 

 nymphs. H. dromedarii is so intimately associated with camels 

 that it does not occur outside the normal ranre of these animals. 

 However in parts of Anatolia where camels are now considerably 

 less numerous than heretofore, large numbers of adults have been 

 found on cattle ana horses, fewer on sheep and goats (Hoogstraal, 

 ms.) . 



In nature, remote from large concentrations of domestic ani- 

 mals, larvae and nymphs feed on small burrowing mammals and hares, 

 rarely on lizards. Adults venture forth in search of larger hosts. 

 Nymphs appear to be more versatile, depending on local situations, 

 and may infest camels, cattle, and horses in large numbers. 

 Factors inducing the selection of hosts by nymphs are in need of 

 study. 



In the laboratory, Delpy and Gouchey (1937) fed larvae on 

 hares and calves but this stag;e rarely engorged on camels or 

 sheep. The same was true for nymphs. Adults attached rapidly 

 to camels and cattle, rarely to sheep. It was often difficult 

 to rear on a calf the Fi generation of a female collected on a 

 camel. Further review of J)el^py ana Gouchey' s report is presented 

 in BIOLXY below. 



In Yemen, Southwestern Arabia, numerous larvae and nymphs 

 have been collected from the following hosts (Hoogstraal, ms.): 



Lepus arabicus arable us Ehrenberg 



Lepus arabicus subsp. 



Rattus'~'rattus rattus Linnaeus (rare) 



Gerbillus chee'smanl maritimus Sanborn and Hoogstraal 



In Egypt, including Sinai, nymphs have been taken from 

 hedgehogs, hares, rodents, and lizards (identifications based 

 on adults reared from nymphs) (Hoogstraal, ms.). 



Hemi echinus auritus aegyptius Fischer (common on 



Mediterranean littoral J 

 Paraechinus aethiopicus dorsalis Anderson and De Winton 



(few hosts examined") 



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