146 



SCORPION'S, SPIDERS, AND TICKS 



ill the fields where the "seed" ticks ai-e, fasten themselves 

 to their host, and live there until mature. 



The most common tick in the northern states is the dog 

 tick. It derives its name from the fact that it is most 

 conuHonly found on dogs, although it often infests other 



Fig. S-i. — Southern cattle tick : .1, enlarged; B, natural size. 



animals. When fully matured, the female is about one 

 half inch long. The back of this tick is marked with bright 

 silvery lines and blotches. The young are found on the 

 leaves of weeds and bushes, whence they gain access to the 

 bodies of passing animals. 



Spiders. —In general, spiders have acquired an unsavory 



