Technical Series No. 2. 
U. S. DEPARTMENT OF AGRICULTURE. 
DIVISION OF ENTOMOLOGY. 
THE 
GRASS AND GRAIN JOINT-WORM FLIES 
AND 
THEIR ALLIES: 
A CONSIDERATION OF SOME NORTH AMERICAN 
PHYTOPHAGIC EURYTOMIN.E. 
BY 
L. O. HOWARD 
ENTOMOLOGIST. 
WASHINGTON: 
GOVERNMENT PRINTING OFFICE, 
1896. 
