INTRODUCTION. 



The principal object of the present Catalogue has been to 

 give a complete list of all the Anoplura, or Parasitic In- 

 sects, that have been recorded as found in Great Britain 

 and Ireland, indicating those species which are contained in 

 the Collection, and those which are wanting in it. 



The arrangement followed is that used in Mr. Denny's 

 'Anoplura Britannica,' 8vo, 1842. 



The British Museum possesses the type specimens de- 

 scribed and figured by that author, who has devoted so 

 much of his attention to the study of these animals. 



JOHN EDWARD GRAY. 



British Museum, 



1 September 1852. 



