Technical Series No. 7. 
U. S. DEPARTMENT OF AGRICULTURE. 
DIVISION OF ENTOMOLOGY. 
REVISION OF THE TACHINIM 
OF 
AMERICA XORTII OF MEXICO. 
FAMILY OF PABASITIC TWO WINGED INSECTS. 
BY 
D. W. COQUILLETT. 
WASHINGTON: 
GOVERNMENT PRINTING OFFICE. 
1897. 
