ARACHNIDA 



109 



The mouth parts are more or less united to form a beak. The 

 common red mite sucks the juices of the house plants which it 



Fig. 80. The chicken mite (Dermanys'sus galli'nce): a, Adult; 6, tarsus; 

 c, mouth parts; d and e, young. All much enlarged. (Osborn, U. S. Bu- 

 reau of Ent., 1907). 



Fig. 81. Cattle tick (enlarged). (After Salmon and Stiles.) 



infests. One mite (Dem'odex) is parasitic in the hair-follicles of 

 the dog, cat, sheep, cow, horse, and man. Another mite 



