—  MeCANTICAl CeMles NO. 4. SAA s- 
es » Gs 
SU. S. DEPARTMENT OF AGRICULTURE. 
DIVISION OF ENTOMOLOGY. 
REVISION OF THE TACHINIDAL 
OF 
AMERICA NORTH OF MEXICO. 
A 
FAMILY OF PARASITIC TWO-WINGED INSECTS. 
D. W. COQUILLETT. 
WASHINGTON: 
GOVERNMENT PRINTING OFFICE, 
1897. 
