TICKS. 89 
maxille end in a long, curved, toothed, sickle-like blade. 
That this creature has the habits of the itch-mite is suggest- 
ed by the curious, large, hair-like spines with which the body 
and legs are sparsely armed, gome being nearly half as long 
as the body. These hairs are covered with very fine spinules. 
\ 

Fig. 53.—Tyroglyphus 
(Acarus) sacchari. Great- ; 
ly enlarged. After Pack- Fig. 54.— Cheletus spec. Greatly en- 
ard. larged. Atter Packard. 
Those on the end of the body are regularly spoon-shaped. 
These strange hairs which are thickest on the legs, probably 
assisted the mite in anchoring itself in the skin of the host.”’ 
It is quite certain that a number of other mites belong- 
ing to various families can exist, for some time atleast, upon 
the skin of man and domesticated animals, and these mites 
need not necessarily be blood-sucking species. For instance 
Crithoptes monunguiculosus has been found in Germany to be 
the cause of an endemic disease attacking some laborers who 
were loading barley containing such immature six-legged 
and dark-red mites. Another mite, Cheletus, was found in 
the pus coming from the ear of a sailor. 
E. TICKS. 
(Lxodide.) 
The ticks or wood-ticks are well known to all people 
that live near uncultivated land, and to hunters and others 
that are in the habit of visiting forests. They all have 
learned that these parasites can be very troublesome to man 
