46 
THE PERIODICAL CICADA. 
seen from this map that the southern limits of Brood VII almost precisely coincide 
with the northern limits of our Brood VI. 
"The following is an enumeration of the States and counties from which Brood 
VI has heen recorded : 
" Mississijtyi. — Counties of Adams, Amite, Claiborne, Franklin, Jefferson, and 
Wilkinson. 
"Louisiana. — Parishes of East Baton Rouge, East Feliciana, Livingston, St. Heleoa, 
St. Tammany(f), Tangipahoa (?), Washington (?), and West Feliciana." 
Brood XII.— Septendecim— 1911. (Fig. 16.) 
This is one of the best recorded of the broods, since its almost exclu- 
sively eastern range brings it in the immediate vicinity of the large 
towns and more densely populated districts of the Atlantic seaboard. 
Fig. 16. — Map showing distribution of Brood XII, 1911. 
Fitch described its limits as his Brood No. 1 and Walsh-Riley as Brood 
VIII. It has been reported in Connecticut regularly every seventeen 
years since 1724, and in New Jersey since 1775, if not earlier, and 
almost equally long records of it in other States have been made. 
On the occasion of its last appearance, in 1891, its distribution in New 
Jersey was very carefully studied by Prof. J. B. Smith, confirming its 
occurrence in every county in that State, and in New York similar 
studies were made by Dr. J. A. Lintner. The Division also received a 
vast number of reports from these and other States in answer to a cir- 
cular prepared by Frofessor Eiley and mailed in May, 1S94. Some of 
the Southern records obtained in 1S91 are doubtful, and this applies 
