98 Mites Injurious to Domestic Animals. 



takes place possibly by bees visiting the same flower or drinking- 

 place. or perhaps the mite is introduced by strange bees or drones 

 drifting into a hive, or is acquired by healthy bees whilst robbing an 

 infected colony. 



FIG. 81. 



Acarapis woodi. Dorsal view of male, x 650. 

 (After Hirst, Ann. Mag. Nat. Hist., June, 1921.) 



There is no nymphal stage either in Acarapis or in Tarsonemus, 

 this stage being entirely suppressed. It is probable, therefore, 

 that the disease spreads by transference of adult mites. After the 

 death of the bee the mites continue to live for several days, and the 

 great majority of them seem to die without leaving the body of 



