Bart ks 
U.S. DEPARTMENT OF AGRICULTURE. | 
DIVISION OF ENTOMOLOGY. 
BULLETIN No. 8. 
a ee 
| PERIODICAL CICADA. 
| AN ACCOUNT OF CICADA SEPTENDECIM AND ITS TREDECIM RACE, WITH 
A CHRONOLOGY OF ALL BROODS KNOWN. 
| BY 
| GEAR LES V. RILEY. PhD. 
WASHINGTON: 
GOVERNMENT PRINTING OFFICE. 
1885. 
