PLATE I. 



Athenian Coins. (Page xi.) 



Figs. 1 and 2. — Obverse and reverse of a silver 

 tetradrachm, having the representation of a Tettix or 

 Cicada for a symbol of the chief magistrate, whose 

 name is inscribed. 



Figs 3 and 4. — The two sides of a copper coin, 

 having thereon, respectively, figures of the Owl, sacred 

 to Pallas, and the Tettix. 



Figs. 6 and 6. — A similar coin, stamped with the 

 head of Pallas, and also a Tettix on the reverse. 



These drawings are taken from specimens to be 

 seen in the British Museum. 



CiCADETTA MONTANA. (Page 1.) 



Fig. 7. — Slightly enlarged representation of the 

 imago, or winged insect. The exact size, viz., expanse 

 of wings and length of body, is given by the lines 

 at the foot of the Plate. 



Fig. 8. — Larval form. After West wood. 



Fig. 9. — Pupal stage. Its active habits are shown 

 by the presence of legs, &c. After Mr. E. Newman's 

 figura. 



Fig. 10. — Ventral view of the abdominal rings, with 

 their separate stomata (e, e). The apex of the abdomen 

 is occupied by the pygofer, which, in the female, 

 consists of the navicular valve {v), the double sheath 

 enclosing the complicated saws (d), the outer plates (c), 

 and the basal plates (g). At the base of the meta- 

 sternum the broad plate or operculum {h) is seen. 



