PREFACE. 
The present part of the " Illustrations of Typical Specimens of Lepicloptera 
Heterocera in the British Museum " deals exclusively with the Tortricidm 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. 
ALBERT GUNTHEE, 
Keeper of the Department of Zoology. 
British Museum, November 29, 1879. 
