Head of Bipipteryx. M, epicranium. (E(E,eyes. ae.clypeus. a,labrum. y y, antennae. 



CHAPTER II. 



ON THE HEAD, LEGS AND WINGS OF INSECTS. 



HAVING described the shell, frame, or skeleton of an insect, 

 and its division into segments, we must next give our at- 

 tention to those parts which, though strictly portions of the 

 skeleton, may be conveniently treated as its appendages, 

 and we will examine these in the order in which they 

 occur, beginning with those of the first segment. Previ- 

 ously however to describing the appendages of the head, 

 it may be useful to take a cursory view of the head itself. 

 Looking at the above figure, we shall observe it possesses 

 a considerable similarity to the skull of some quadrupeds ; 

 the arched top may be considered to represent the crown 

 of the head; the space in front, &, the forehead; the 



