330 

 GENUS ARGAS 



Eyes absent. Rostrum, which is concealed by 

 cephalo-thorax, is situated at least its own length 

 behind the anterior margin. No projecting head. 

 Body oval or elliptical, flat or hollow dorsally, with 

 fine granulations. The edges with a lateral ridge 

 with different markings from those on rest of dorsal 

 surface. No groove behind the anus. 



(1) A. miniatus. Body oval, margin formed of 

 rectangular festoons. Dorsal submarginal granulations 

 contiguous. The American fowl tick. 



Pathogenicity. Transmits Sp. gallinarum in S. 

 America. 



(2) A. persicus. For its injurious effects famous 

 to travellers from Persia to Pekin. A poultry pest in 

 S. Africa. 



GENUS CARIS 



Body almost as wide as long. Has a conspicuous 

 transverse groove behind the anus, differing from 

 Argas in this respect. 



(i) C. vespertilionis. Parasitic on bats. 



LITERATURE 



(a) NEUMANN'S Monographs are indispensable for the identifica- 

 tion of ticks. 



Mem. Soc. Zool. de France, t. IX, 1896, pp. 1-44; t. X, 1897, 

 pp. 324-420 ; t. XII, 1899, pp. 107-294 ; t. XIV, 1901, pp. 249-372 ; 

 the last containing tables of all the genera and species. 



Archives de Parasitologie, 1902-1907. 



Annals of Tropical Medicine and Parasitology, Vol. I, No. I, 1907. 



() SALMON and STILES. Cattle Ticks of the United States, 

 XVIIth Annual Report, 1900, Department of Agriculture. An 

 excellent summary, casting a few shillings only. 



(c) DONITZ, W. Die wirtschaftlich wichtigen Zecken mit 

 besonderer Beriicksichtigung Afrikas. 



