ORDER HEMIPTERA. 



71 



Faviily I, Cicadida. — These insects are mostly inhabitants of 

 warm climates, and our only British representative of the family 

 (C anglica) is one of the smaller species, the wings only expand- 



Flg. 99. — Delphax Longipennls. 



ing about an inch and a quarter. Four or five hundred species, 

 however, are known to inhabit the world, and some of them attain 

 to considerable dimensions. 



Fig. TOO. — Derbe Strigipennis (Mag. ) 



They generally live upon trees and shrubs, and obtain their 

 nourishment by piercing the tissues and sucking out the juices of 

 their young tender shoots. 



Fig. loi. — Issus Coleoptratus. 



The Cicadas are improperly called ''Locusts" both in America and 

 Australia, on account of the chirping noise which they perpetually 

 keep up in the woods, both day and night. 



