-is \ 



/^O^ 



't^ PREFACE. 



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\ 



This Part contains the completion of the Ust of species 

 belonging to the Family Apid.^, at the same time 

 indicating those at present contained in the Collection of 

 the British Museum. 



It has been prepared by Mr. Frederick Smith, 

 who has taken every care in the determination of the 

 species, the references to the synonyma, and in the 

 descriptions of such species as hitherto are apparently 

 undescribed. 



The remaining Families will follow as soon as they 

 can be completed. 



JOHN EDWARD GRAY. 

 October 1854. ' 



