-7f 
U. S. DEPARTMENT OF AGRICULTURE. 
BUREAU OF ENTOMOLOGY BULLETIN No. 71. 
L. O. HOWARD. Kntomologisl and Chief of Bureau. 
Tin-: 
PERIODICAL CICADA 
BY 
C. L. MARLATT, M. S., 
EntomoIogiHt. and Adlng ChU-f in AI>.<ience of Chief. 
l6.suEr) Jri.Y 18, U'O'; 
WASHINGTON: 
GOVERNMENT PRINTIN(; OFFICE, 
1 9 U 7 . 
