of Rhipiphorus paradoxus. 915. 
biting or c ewing. The larve of the hornet make a great 
noise by striking and scratching the walls of their cells with 
their expanded jaws. I take this to be a call for food. The 
black material is evacuated just before the grub begins to spin 
its silken covering; and this is the only time at which its ali- 
mentary canal is emptied. This is sufficiently proved by 
the store of black matter in the grub’s interior increasing In 
quantity with the growth of the grub, and by the anal ex- 
tremity of the grub being always enveloped in a cast skin; so 
