Technical Series No. 7. 
treo. DEPARTMENT OF AGRICULTURE. 
DIVISION OF ENTOMOLOGY. 
REVISION OF THE TACHINIDA: 
OF 
AMERICA NORTH OF MEXICO, 
A 
FAMILY OF PARASITIC TWO-WINGED INSECTS. 
BY 
DW. COQUILEETT. 
WASHINGTON: 
GOVERNMENT PRINTING OFFICE. 
L397. 
