o 
PREFACE. By Dr. M. Draudt. 
Haas, Fritz Wagner of Vienna and Mr. Dannehl who have so kindly placed very valuable type material at 
our disposal. 
In broad outline we have followed exactly the classification of the material according to the subdivision 
in Vol. Ill of the main Work. In general this followed the principles of Hampson, whose volumes of the Cat. 
Lep. Phal. however were not available at the time the Work Was published so that also in this respect complete 
perfection was not achieved. There will be little to criticise apart from the interposition of the Mominae, 
Acronyctinae and Bryophilinae which in any case are a strange conglomeration. However in the interest of an 
easy comparison we have followed the systematic arrangement of the main part of the Work, more especially 
as in most other Works on the subject this old order is still followed. 
