70 THE PERIODICAL CICADA. 
and 4 miles west also of Liberty, in Amite County, Miss., thus extendirg from 15 to 50 
miles from the Mississippi River, and from the vicinity of Baton Rouge, 108 miles to 
the northern limit of Claiborne County, Miss., perhaps even farther. They therefore 
occupy East and West Feliciana, the northern part of East Baton Rouge, the northwest 
corner of Livingston and the western part of St. Helena parishes, La., and Wilkinson, 
Adams, Jefferson, Claiborne, and parts of Amite, Franklin, and possibly parts of one or 
two more counties in Mississippi.”’ 
The reports received since 1885 are mostly confirmatory of Doctor Phares’s state- 
ment, but Mr. Thomas F’. Anderson, of St. Helena, La., writes us that the parishes, or at 
least parts of the parishes, of Tangipahoa, Washington, and St. Tammany had to be 
added to the range of this brood. His statement is quite definite; still a confirmation 
of these new localities is desirable. : 
3rood VI [XXII] is evidently a forerunner of the very large 13-year Brood VII 
[XXIIT], which will appear in 1898 inthe Mississippi Valley. The geographical 
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oy) 
a) 
v 
w 
Fig. 25.—Map showing distribution of Brood XXTI, 1910. 
range of Brood VII [XXIII] was mapped out in the Annual Report of this Depart- 
ment for 1885, and it will be seen from this map that the southern limits of Brood 
VII [XXIII] almost precisely coincide with the northern limits of our Brood VI 
[XXIT.] 
One new locality in central Louisiana, in Catahoula County, has been 
added. 
The brood occurs in the following States and counties: 
Loutstana.—Parishes of East Baton Rouge, Catahoula, East Feliciana, Livingston, 
St. Helena, St. Tammany (?), Tangipahoa (?), Washington (?), and West Feliciana. 
Misstsstppr.—Counties of Adams, Amite, Claiborne, Franklin, Jefferson, and Wil- 
kinson. ; 
