349 



by the cephalo- thorax, is situated at least its own 

 length behind the anterior margin. No pro- 

 jecting hood. Body oval or orbicular. The 

 species are nocturnal in their habits, infest birds 

 mainly. There are eleven species. A species of 

 Argas is the transmitter of ' spirillar fever ' of 

 poultry. 



A. reflexus infests pigeons, European. 



A. persicus = Ganh-Guez of Persia. The bite 

 is said to produce severe local and constitutional 

 effects. 



' A. tholozani = Kene of Persians, similar 

 effects ascribed to it. 



Genus Ornithodorus 



Eyes present or absent. Rostrum hidden 

 under a projecting beak (hood), close to the 

 anterior margin of the body, so that the tips of 

 the palpi are visible from above. Lateral borders 

 of body generally straight, sometimes concave, 

 tegument mammillated. 



0. moubata — ' Garrapata,' tick of Tete on 

 the Zambesi. The bite is said to occasion severe 

 local and general disturbances. It is the cause of 

 ' tick fever ' in Uganda (Christy). 



LITERATURE 



1. Cattle Ticks of the United States. Salmon and Stiles, 

 Washington, igo2. An excellent compendium on ticks, many 

 illustrations. Price, a few shillings. 



2. L. G. Neumann. Revision de la famille des Ixodides, 

 Memoires. Soc. Zool. France. Complete monographs. 



3. Texas Fever. Theobald Smith and F. L. Kilborne, 

 1893. Washington. Bulletin No. i. 



' 4. Wasielewski. Sporoeoenkunde. 



5. The SporoBoa. Minchin in Lankester's Zoology. 



