The Form of Insects 



and at the sides, somewhat flattened before and behind 

 (figs. 3, 4). It is composed of several sclerites. 

 In front the face (clypeus) is conspicuous ; from 

 its lower edge hangs the upper lip {labruni) behind 

 which is the membranous roof {epipharynx) of the 

 mouth, the seat of the sense of taste. Above the 

 face, forming the top and back regions of the 



Fig. 4. — Side view of 

 Cockroach's Head. 

 cly. face ; oc. eye ; ge. 

 cheek ; }>in. mandible. 

 Magnified 10 times. 

 From Miall & Denny. 



Fig. 5. — Fore-half of Cockroach's Head from 

 behind, showing tentorium and mandibles. 

 Magnified 12 times. From Miall & Denny. 



head, is the crown (epicratiium), consisting of two 

 plates united by a central suture. At either side we 

 find a large compound eye and a cheek {getm). Be- 

 hind the head is a large shield-shaped opening {occipital 

 foratneti), through which the gullet, nerve-cords, and 

 air-tubes pass back into the body. "Within the head- 

 capsule is a complex inner skeleton {tentoriinn) formed 



