PREFACE 



The object of the present Catalogue is to give a complete 

 list of all the genera and species of Fossorial Hymenoptera 

 which have been described in works, and a description 

 of those in the British Museum which appear to have 

 been hitherto overlooked. 



The letters B.M. in the margin show the species now 

 contained in the BritisTi Museum, and their absence indi- 

 cates those which are desiderata, and therefore desirable to 

 be procured for the Collection. 



JOHN EDWARD GRAY. 



12th June, 1856. 



