Vl PREFACE. 



given ; but having now found that such names are often joined to 

 species for which they were not originally intended by the authors, 

 I intend henceforth to reject them altogether, and not to introduce 

 them into the synonymy unless published with a proper diagnosis. 



" The number of specimens in the Collection of the British 

 Museum, contained in this Catalogue, amoimts to 1691. 



" I am able to vouch for the correctness of the plates, which were 

 executed by Mr. Ford under my inspection." 



JOHN EDWARD GRAY. 



British Museum, 

 July 1, 1858. 



