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 peculiarities of each, as regards variation 

 of character, locality, and the sowce from whence it has been 

 derived. With this view, the different individuals of each 

 species contained in the collection are indicated by the lettei-s a, 

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

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

 (lescribed. 



Tliis pai't 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 remaining pai't, containing the other families, is in hand, 

 and will follow as soon as it can be completed. 



JOHN EDWARD GRAY. 

 British Museum, 



Oct. Ibth, 1850. 



