HOMOPTERA. 301 



the grooves of a supporting plate at the back (x), play 

 alternately upon the wood to be bored for the reception 

 of the Cicada's eggs. Some of this family leap. 



Ovipositor of Cicada. (Taken from Weatwood.) 

 a. The borer. 

 6. Do. more highly magnified, seen from beneath. 



c. Do. do. from above, one blade slightly protruded. 



d. Do. do. blade fully protruded. 

 x The supporting plate at back. 



In the remaining Trimerous insects the antennae are 

 of three joints only, and the ocelli are two in number. 



The Fulgoridse, Fire-flies or Lanthorn-flies of hot 

 countries, find some small representatives in England 

 (about forty or fifty species), but none of them are 

 luminous. They may be recognised by the position of 

 the antenna, which are inserted below the eyes. Most 

 of them have legs fitted for leaping. The young micro- 

 scopist will find some species (as Cixius cunicularis) 

 well worth seeking for the sake of their delicate beaded- 

 veined fore-wings. One genus in this family (Delphax, 

 containing nineteen species) might occasion some diffi- 

 culty to the young student, as most of the species are 

 usually found with only the basal half of the fore-wings 

 developed, and wanting the hind-wings altogether. Mr. 

 Westwood states, however, that the wings are sometimes 

 found fully developed in hot seasons. 



Next in this section come the Cercopidse, containing 



