LEPIDOPTERA. 



355 



thicken from the base, and are frequently angular 

 and rough. The caterpillars have always sixteen 

 feet, are generally destitute of hair, and often, 

 especially in the larger kinds, have a stiff projection 

 like a horn on the hinder part of the body. These 

 have the habit of raising the fore half of their 

 bodies with the head bent down, sitting for a long 

 time in a posture resembling that of the Egyptian 



THE UNICORN HAWK-MOTH 



Sphinx, after which the family was named by Lin- 

 naeus. The pupae are smooth, that is, not angular 

 like those of Butterflies ; but some have the sucker, 

 winch in this Family is very long, enclosed in a 

 separate skin or case, and projecting from the head. 



