on (lie Domestic Cat. 



133 



In the genus Cliehtiella the palp is stout, ending in a short 

 prehensile claw, which is used to grasp the hairs or featliers 

 of the host. Several species of CheletieUa have been found 

 on birds or in tlieir nests, but apparently C parasitivurax 

 is the only one that lives on mamnutls ; it can be readily 

 distinguished from the other species of the oenus by 

 the al)sence of the claws, which liave entirely disappeared. 

 Perhaps the best figure of C. parasitivorax is Canestrini's 

 (Prosp. Acarof. ii. pi. xi. fig. 3), but it is not quite accurate 

 in all ihe details ; fur instance^ the scutum is not shown, 



Dorsal view of CheletieUa 2')f>rasitivor(LV, M(5gTiin. 



and one of the pairs of short plumose hairs at the anterior 

 end of the body is also omitted ; moreover, the hairs of the 

 outer pair in the middle of the body are depicted as being 

 plain instead of plumose. Specimens of the CheletieUa from 

 the cat have been carefully compared with others from 

 rabbits, and apparently there is no structural difference 

 between them. The new figure accompanying the present 

 note has been carefully drawn by Mr. Percy Highley with 

 the aid of a camera lucida. 



