ANIMAL PARASITES 161 



study bees will know that a bee does not perform 

 antics of this kind without a cause. So we must 

 find the cause. 



On taking up the bee and examining it with a 



106. The forep-irts of another of the bee 

 parasites more highly magnified 



magnifying-lens, near to where the wings unite 

 with the body, could be seen a small patch of pale 

 yellowish colour, which I at once recognised as the 

 cause of irritation and of the bee's gymnastics. 

 The bee was without a doubt unwillingly enter- 



L 



