10 TRANSFORMATIONS OF INSECTS. 
epidermal cells, whose predecessors were infinitely more simple 
and less elegant in the immature insect. 
THE CATERPILLAR OF Sphinx ligustri (THE PRIVET HAWK MOTH). 
It is the essential peculiarity of articulate animals to be divided 
into segments or rings, and these somites, as they are sometimes 
THE MOTH OF Sphinx ligust/t. 
called, can be traced in the embryo within the egg, in the larva, 
nymph, or chrysalis, and in the perfect insect. Huxley distin- 
guished six segments in the head of the young insect, and he 
