INTRODUCTION. 



THE principal object of the present Catalogue has been to 

 give a complete list of the Specimens of Hemipterous In- 

 sects contained in the Collection of the British Museum, 

 indicating at the same time the peculiarities of each, as re- 

 gards variation of character, locality, 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 , b, c, &c., following the name of 

 the species and its synonyms, and the description, if it ap- 

 .red to have been before undescribed. 



This part of the Catalogue of Hemipterous Insects has 

 ;en prepared, and the new species described, by Mr. W. 

 . DALLAS, F.L.S., so well known for his attention to this 



rder of Insects. 



The more interesting of the new genera are figured in 

 the Plates at the end of the Catalogue. 



The remaining Part is in hand, and will follow as soon as 

 it can be completed. 



JOHN EDWARD GRAY. 



British Museum, 



June 6th, 1852. 



