4 GROTE—THE DESCENT OF THE PIERIDS. [Jan. 5, 
lors, held this day between the hours of two and five in the 
afternoon, reported that the following-named persons had 
been chosen according to the laws, regulations and ordinances 
of the Society to the offices for the ensuing year: 
President. ; 
Frederick Fraley. 
Vice-Presidents. 
Coleman Sellers, Isaac J. Wistar, George F. Barker. 
Secretaries. 
I. Minis Hays, Frederick Prime, Samuel P. Sadtler, 
Richard A. Cleemann. 
Treasurer. 
Horace Jayne. 
Curators. 
J. Cheston Morris, Benjamin Smith Lyman, Henry Pettit. 
Councillors to serve for three years. 
George R. Morehouse, Patterson DuBois, Henry C. Trumbull, 
C. L. Doolittle. 
The Society was adjourned by the presiding officer. 
THE DESCENT OF THE PIERIDS. 
(Plates I-IV.) 
BY A.-RADCLIFFE GROTE, A.M., 
Vice-President of the American Association for the Advancement of Science, Etc. 
(Read January 5, 1900.) 
GENERAL WING CHARACTERS OF THE PIERIDS. 
A horde of bright butterflies with entire wings, simply marked 
in gay and contrasting colors: white, yellow, orange, red, brown- 
ish and black, rarely with a blue reflection or a lilac shade, but 
often marbled beneath with lichen green, of the most general dis- 
tribution, and numbering almost all of the very few species of 
diurnals counted as injurious to vegetation. The neuration of the 
