26 GR.VM.MAR Ol' ENTOMOLOGY. 



end, a portion of the shell falling completely off; 

 and tlie perfect insect then emerging through the 

 aperture, escapes from his confinement, and soon 

 attains hardness and maturity, and flies away. 



74. A second species of bot lays its egg on the 

 lips of the horse, occasioning an annoying itching, 

 at which the animal is much distressed, rubbing 

 his nose violently against the ground, the stem of 

 a tree, or his own legs, or galloping away with all 

 his might : both the larva and perfect insect of 

 this species are smaller than those of the fore- 

 going. 



