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 has been called the forehead, (frons). The clypeus (nasus of Kirby, Epistome of Latreille,) occupies the anterior 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 additional names, which will be afterwards noticed. On the lower and lateral regions of the head, the following 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, (genæ) 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.[1]
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 propinquity 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.
