INTRODUCTION. 



The principal object of the present Catalogue has been to 

 give a complete list of the specimens of Homopterous Insects 

 contained in the collection of the British Museum, indicating 

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

 of charaxiter, locaUty, and the source from whence it has been 

 derived. With this view, the different individuals of each 

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

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

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

 described. 



This part of the Catalogue 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 two remaining parts are in hand, and will follow as soon 

 as they can be completed. 



JOHN EDWAKD GRAY. 



British Museum, 



April 28tft, 1851. 



