100 
INTRODUCTION TO 
backwards, is the Epicranium , the posterior portion 
of which, where the stemmata are often situated, is 
the Vertex . Bounding the epicranium in front and 
extending to the clypeus, is a space which lias been 
called the forehead, (frons). The clypeus ( nasus of 
Kirby, Epistome of Latreille,) occupies the ante- 
rior part of the head immediately above the mouth, 
it being apparently its office to guard the oral organs 
from injury. Sometimes the whole of the anterior 
portion of the head from the mouth to the region of 
the eyes, is denominated the face, {facies) and in 
certain tribes particular parts become developed, 
and consequently require to be indicated by addi- 
tional names, which will be afterwards noticed. On 
the lower and lateral regions of the head, the fol- 
lowing parts may be particularized : the Gula or 
throat, which lies immediately posterior to the under 
lip, and extends to the point where the head joins 
the prothorax : the cheeks, {gence) composing the 
sides of the head from the eyes downwards to the 
mouth ; the posterior portion of which lying in the 
vicinity of the eyes, is termed the temples, {tempora.) 
When the head is vertical or nearly so, the back 
part of it is called the occiput* 
Such are the principal fixed parts of the cranium, 
if we add the eyes and ocelli ; when others require 
to be definitely pointed out, they may in general be 
intelligibly named and characterised from their pro- 
pinquity to other parts. We are now to notice the 
* For delineations of the different parts of the head, thorax, 
&c. see Plate 1st, with the annexed explanation. 
