144 ELEMENTARY LESSONS ON INSECTS 



have some additional, such as the horn fly of cattle, the 

 bot fly of horses and the nose-maggot of sheep. 



5. Miscellaneous. — These principal classes of insect in- 

 juries are intergrading and overlapping, and they do not 

 cover all the cases. The damage done to the combs by the 

 wax moth of our bee hives, or to the stored milk flakes of 

 our milk drying factories, will hardly fit any of them. Nature 

 is no respector of categories. She is infinite in resources. 



