INTRODUCTION. 



The principal object of the present Catalogue lias been to 

 give a complete list of the specimens of Homopteroiis Insects 

 contained in the collection of the British Museum, indicating 

 at the same time the peculiarities of each, as regai'ds variation 

 of character, locality, and the som'ce from whence it has been 

 derived. With this view, the different indi\iduals of each 

 species contained in the collection are indicated by the letters a, 

 b, c, &c., foUowiug the name of the species and its synonymes, 

 and the description, if it appeared to have been before un- 

 described, 



Tliis part of the Catalogiie of Homopterous Insects has 

 been prepared and the new species described by Mr. Francis 

 Walker, so well known for his attention to this order of 

 Insects 



The remainhig part, containing the other famihes, is in hand, 

 and mil foUow as soon as it can be completed. 



JOHN EDWARD GRAY. 

 British Museum, 



Oct. loth, 1850. 



