Technical Series No. 1. 
U. S. DEPARTMENT OF AGRICULTURE. 
DIVISION OF ENTOMOLOGY, 
REVISION 
OF THE 
APHELINIM OF NORTH AMERICA 
A SUBFAMILY OF HYMENOPTEROUS PARASITES 
OF THE FAMILY CHALCIDIDiE. 
BY 
L . O . HOWARD, 
ENTOMOLOGIST. 
WASHINGTON: 
GOVERNMENT PRINTING OFFICE, 
1895, 
