PEE FACE, 



The object of the present Catalogue is to give a complete List of 

 all the genera and species of Hemiptera Heteroptera known to 

 exist in the collections of European and American Entomologists. 

 The letters a, b, c, etc., after the species, denote the specimens now 

 contained in the British Museum, followed by the habited and the 

 mode in which each of them was obtained ; and the absence of 

 these letters indicates the species which are desiderata, and there- 

 fore desirable to be procured for the collection. 



J. E. GllAY. 



British Museum, 



August -Z~.th, 1872. 



