on the Domestic Cat. 133 
Tn the genus Cheletiella the palp«is stout, ending in a short 
prehensile claw, which is used to grasp the hairs or feathers 
of the host. Several species of Cheletiella have been found 
on birds or in their nests, but apparently C. pardsitivorar 
is the only one that lives on mammals ; it can be readily 
distinguished from the other species of the genus by 
the absence of the claws, which have entirely disappeared. 
Perhaps the best figure of C. parasitivorax is Canestrini’s 
(Prosp. Acarof. 11. pl. xi. fig. 3), but it is not quite accurate 
in all the details ; for instance, the scutum is not shown, 
Heghley del 
Dorsal view of Cheletiella parasitivorax, Mégnin. 
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 Cheletiella 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. 
