| U.S. DEPARTMENT OF AGRICULTURE. 
‘ . DIVISION OF ENTOMOLOGY. 
BULLETIN No. 8. 
CS yoniCGiOuN ID) oe IO iy ls GINS) 
a 
PERIODICAL CICADA. 
~ AN ACCOUNT OF CICADA SEPTENDECIM AND ITS TREDECIM RACE, 
WITH A CHRONOLOGY OF ALL BROODS KNOWN. 
BY 
COAREES Vo-RIGDEY:; Ph..D- 
WASHINGTON: 
GOVERNMENT PRINTING OFFICE. 
1885. 
