

PREFACE. 



The present part of the " Illustrations of Typical Specimens of Lepidoptera 

 Heterocera in the British Museum " deals exclusively with the Tortricidce of 

 North America in the National Collection. Many species originally named by 

 the late Mr, Walker are now fully described and figured. But our knowledge of 

 this group has received, besides, an important addition by numerous new species 

 discovered and collected by Lord Walsingham in 1871 and 1872, chiefly in 

 California and Oregon. These are now for the first time described, the types 

 having been presented by him to the Museum. 



ALBEET GUNTHER, 



Keeper of the Department of Zoology . 



British Museum, November 29, 1879. 



