VI PREFACE. 



formed by the late Mr. Herbert Druco has passed, Dr. 

 Harrison G. Dyar, of the U.S. National Museum, Mr. W. 

 Sehaus, M. Paul Dognin, and many others. 



The coloured drawings, which have been made for him 

 from types oE species which are not in the collection of the 

 British Museum and of which he has been unable to examine 

 specimens, have been reproduced and are severally acknow- 

 ledged in the text, and in this matter he has in especial to 

 thank Dr. L. 0. Howard, the Director of the U.S. National 

 Museum. 



The Plates in connection with this volume are numbers 

 XLII.-LXXI. of the Supplement. 



In the selection of the generic and family names employed 

 in this volume, the author has adhered to the views which he 

 adopted in all the previous volumes. Although some of his 

 views on nomenclature have been rejected by the great 

 majority of zoologists, it seems undesirable at this stage in 

 the preparation or the Catalogue to alter the system which 

 he has so far followed. 



CHARLES J. GAHAN, 



Biutish Museum (Natural History). Kee P er °f Entomology. 



March 5th, 1920. 



