CHRONOLOGICAL ACOOUNT OF DIFFERENT BROOl 87 
It not improbably overlaps some of the territory occupied by the teptendeeim Brood 
XIV, but I do not think it extends into Kansas. 
In Illinois it occurs more or less throughout tin- whole southern half of the S1 
but more especially ocenpies the comities from the sonthcra part of Adams Couoty along 
the Mississippi to the Ohio, np the Ohio and Wabash Rivera lo "^dgai Count; 
then across the center of the State, leaving souk- of ihe central counties in southern 
Illinois unoccupied. To be more explicit, I enumerate all the couuties in which it 
undoubtedly occurred during the present year (1868): Adams (sooth part, back of 
Quhicy), Bond. Clinton (northwest corner, adjacent to Madison), Champaign, Coles, 
Craw ibid, Cumberland, Clay, Clark. Edwards. Edgar * (especially in the eastern part), 
Franklin, Gallatin, Hardin, Hamilton. Johnson, Jasper, Jersey. Jefferson, Lawivnre, 
McLean (east end). Macon, Madison. Marion. Massac, Monroe, Pike. Perry, Piatt, 
Pope, Richland, Randolph, Sangamou, Saline. Saint Clair, Union (northeast cornei), 
Washington, Wayne, Wabash, Williamson, and White. There were none the present 
year either at Decatur, in Macon County, or at Pan a, in Christian County : noi 
there any at Bloomington or Normal, in McLean : nor in Dewitt County, which lies 
south of McLean ; nor in Spring Creek, Iroquois County, which is northeast of Cham- 
paign 
In Kentucky, according to Dr. Smith, it occurred in the northwest corner of the 
State, about Paducah and adjacent counties south, in 1829, 1642, and 1855, and it oc- 
curred there in 1868. 
In Arkansas it occupied all the northern counties in 1842, 1855, aud \-< - 
In Alabama it occupied Russell aud adjacent counties on the east side of Black- 
Warrior River in 1842, 1^55, and 1868. 
In Tennessee it occupied Davidson, Montgomery, Bedford, Williamson, Rutherford, 
and adjacent counties in 1842, 1855,1 and 1868. 
In North Carolina it appeared in Mecklenburg County in 18^9, 1-42. 1855, and 
1868. 
In South Carolina, the Chester district, and all the adjoining country to the Georgia 
line west and to the North Carolina line north, was occupied with it in 1"16, 1829, 
184-2, 1855, and 1868. 
In Georgia it has occurred in Cherokee County since the year 1816. 
In Louisiana it appeared in Morehouse. Caddo. Claiborne, Washington, and adja- 
cent parishes in 1855 and 18G8. 
It also doubtless occurs in Mississippi and Indian Territory, though I am unable 
to specify any localities. 
1881. — This is not only by far the largest 13-year brood, but also one 
of the best known of all recorded broods, as can be readily seen from the 
numerous localities where it was observed in 1868 aud at previous visits. 
Its reappearance in 1881 was equally well observed and record e 1. and 
the communications received and tin- other dates collected that year 
nearly equal in number those received since 1868 relating to the other 
twenty-one broods combined. 
In Missouri and Illinois its localities are so well known and estab- 
lished in the above-quoted account that it would be superfluous to give 
here in detail the numerous confirmatory reports of 1881 which I have 
from nearly every county mentioned above. In Illinois the extent of 
the brood was studied by Prof. S. A. Forbes, ot Normal, and Mr. John C. 
' Edgar County also has the septt ndet im Brood 111. 
tThough Cicadas occurred in large Dumbers in Davidson County and other por- 
tions of Tennessee in 1855, and also in 1868, yet in Lawrence County they appeared 
in 1856, instead of 1855 — another instance of a belated brood. 
