INTRODUCTION. 



The principal object of the present Catalogue has been to 

 give a complete list of the specimens of Homopteroiis Insects 

 contained in the collection of the British Musemn, indicating 

 at the same time the pecoharities of each, as regards variation 

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

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

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

 h, c, &c., following the name of the species and its synonymes, 

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

 described. 



This part of the Catalogue of Homopterous Insects has 

 been prepared and the new species described by Mr. Feancis 

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

 Insects. 



The two remaining parts are in hand, and >vill follow as soon 

 as they can be completed. 



JOHN EDWARD GRAY. 



British Museum, 



April ^Sth, 1851. 



