486 EXTERNAL ANATOMY OF INSECTS. 



the eyes, as they do also in Truxalis, appear to be in 

 it a . In this tribe the rostrum is an elongation of the 

 part in question ; and perhaps you would think at first 

 that what I have considered as the nose in Tettigonia F. 

 was also a tendency to this kind of rostrum ; but if you 

 examine the great lanthorn-fiy (Fulgora latemaria), you 

 will find besides, at the lower base of the lanthorn, a tri- 

 angular piece analogous to the nose of Tettigonia, and 

 below it another representing its nostril-piece: — the hori- 

 zontal part of the nose in that genus may perhaps be re- 

 garded as part of the front. In Truxalis F. the face 

 consists of a supine and prone surface, and the latter is 

 composed of the front, after-nose, nose, and organs of the 

 mouth. I may notice here a most remarkable and singu- 

 lar tribe of bugs, of which two species have been figured 

 by Stoll b : in these the head, or rather those parts of it that 

 we have now been describing, the nose, namely, the after- 

 nose, and front, are absolutely divided longitudinally in 

 two, each half having an eye and antenna planted in it ; 

 or perhaps, as it is stated to be divided in one instance to 

 the commencement of the promuscis, the nose is left in- 

 tire, and dips down, as in cases before alluded to : so that 

 in this the nose appears to leave the lobes of the front, 

 which in others embrace its sides. 



iv. Vertex c . — We now come to the vertex, or crown 

 of the head ; which is situated behind the front, and, 

 except where the communication is intercepted by con- 

 fluent eyes, adjoins it. It is laterally bounded by the 

 hind part of the eyes and the temples ; and posteriorly, 



3 Plate XXVI. Fig. 41. i. 



b Stoll Punaises, t. xxxix. /. 279, 280. 



c Plates VI. VII. XXVI. d. 



