ENTOMOLOGY. 
99 
be found to agree entirely with the horns of the 
higher animals." * 
The integument is more or less obviously divided 
in a vertical direction into thirteen segments., and 
each of these segments has been supposed to consist 
of four parts intimately united, which would make 
the whole case consist of fifty two pieces.t But 
the three most obvious divisions, manifest to the 
most cursory observation, are the head, thorax and 
abdomen . 
The Head is very variable in shape, but most com- 
monly spherical, either the longitudinal or transverse 
diameter predominating. It forms a kind of box, 
having an aperture before and behind : the former 
is occupied by the organs of the mouth, the latter by 
the muscles, &e., which connect the head with the 
thorax. The whole of the lateral superficies is oc- 
cupied by the eyes. Particular regions of it have re- 
ceived names from the analogy which they are thought 
to bear to the parts of the head in the higher animals, 
but scarcely two authors agree in their nomencla- 
ture and definitions. Considered as a whole, the 
cephalic box may be regarded as the skull, ( cranium ) 
since it encloses what is regarded as corresponding 
to the brain of the vertebrata. The upper portion 
of the skull extending from the region of the eyes 
* Burmeister Manual of Entom. ; Shuckard’a Trans . p. 231. 
f “ In many of these,” says Mr. Newman, “ each segment 
very evidently consists of a dorsal, a ventral, and two lateral 
plates or bones, which would produce the number two hun- 
dred and eight.” Ent. Mag. i. 398. 
