IV PKEFACE. 



The correction and revision of the proof-sheets were entrusted to 

 Mr. C. 0. Waterhouse, who also took great care in verifying the 

 descriptions with the typical specimens. 



Although Frederick Smith had reached the age of 73 years when 

 he died, his strength and love of work were unimpaired. He 

 had worked in the service of the Trustees for 29 years ; and the 

 excellent arrangement and condition in which he left the col- 

 lections of Hymenoptera and other Insects bear ample testimony 

 to his industry, conscientiousness, and love of order. The study of 

 Hymenoptera he had made so peculiarly his own, that many years 

 must elapse before his place among British Entomologists will be 

 filled again. 



ALBERT GUNTHER. 



British Museum, 

 August 29th, 1879. 



