1900. ] GROTE—THE DESCENT OF THE PIERIDS. 63 
practical realization. Nor should the work of Herrick-Schaeffer 
upon the veining, even if partial and exclusive, be passed over. 
This author was the true successor of Hiibner, who troubled him- 
self alone with color and pattern and shape, not going beneath the 
surface of the wings. If I mention again Mr. Scudder’s Hzstorical 
Sketch, it is to renew the expression of my hope that the book 
may be republished and brought down to date. No one can do 
this so well as the gifted and industrious author whose acquaint- 
ance I have enjoyed for all these years and for whom I feel undi- 
minished esteem. If I have opposed his classification of the but- 
terflies, I have used, in my efforts to subvert it, the same weapons 
employed by him to defend it. I am anxious to say a thankful 
word to Mr. W. H. Edwards for his letters and the information 
he has given me and all of us on the North American butterflies. 
With Dr. Packard, Iam one of four authors who, commencing to 
write at about the same time on American Lepidoptera before the 
war, have lived until to-day to see much that they have accom- 
plished adopted, and, in a varying degree, also disputed. It must 
be our reward to have worked for the spread of knowledge accord- 
ing to our differing lights—manifesta rote vestigia cernes. 
I am glad again to thank Mr. W. F. Kirby, of the British Muse- 
um (Natural History), for his complaisance in affording me informa- 
tion not to be found in Mr. Scudder’s book. Mr. Quail’s papers 
on the neuration have been suggestive to me. I am indebted to 
Dr. Chapman for letters and copies of his ingenious papers on the 
pupz of butterflies. Finally I am indebted to Dr. O. Staudinger 
and A. Bang Haas for determinations which give this work an ele- 
ment of certainty as to the identity of material which it could net 
have had from my own authority. 
