Fig. 3. Arachnid. A tailless whip scorpion. 



About natural size. (Original.) 



shown turned to the rear on the back of the animal. They 

 are not known to be injurious or destructive. 



The spiders include many species of varying size and 

 form. The four pairs of long legs furnish the most promi- 

 nent character of this group. 



Fig. 4. Arachnid. The cattle tick. 



Female cattle tick at the left, male at the right- Enlarged. 

 (From U. S. Dept. Agric.) 



