APPEXDIX. 
DR. GIDEON B. SMITH'S CHRONOLOGY OF THE PERIODICAL 
CICADA. 
[From a copy, by Dr. J. G. Morris, of Doctor Smith's unpublished manuscript.] 
It is proper to remark in relation to the districts in this tribe or 
division that there is some uncertaint}^ in relation to some of them 
(as well as to those of the northern division) that have their borders 
on the great line that separates the two divisions, owing to the fact, 
remarked upon in another place in this work, that the districts often 
interlock, those of the northern running down into the territory" of 
the southern and those of the southern running up into that of the 
northern division, sometimes for hundreds of miles. A remarkable 
instance of this will be found in the case of the southern Illinois dis- 
trict, which ascends to the north nearly three degrees of latitude above 
the regular line of division; and also to the lappiag of one district 
over another on their respective boundaries, elsewhere noticed. The 
reader will therefore make due allowance for such errors as he may 
find in the dates of appearance. 
REGISTER OF THE SOUTHERN TRIBE (tHIRTEEX-YEAR LOCUSTS). 
1842. Illinois. — In Washington, Jefferson, Franklin, Perry, Randolph, Mom-oe, St. 
Clau-, Madison, Bond, Clinton, Edwards, Marion, and adjacent counties in 
the southern end of the State, in 1829, 1842, 1855, and agam in 1868. Of this 
there is great doubt whether it belongs to the seventeen-year tribe, as is 
indicated by the following paragi'aph from the Baltimore Sun of June 13, 1859: 
''The locusts have made their appearance in EgA^Dt, in southern Illinois, 
and cover woods and orchards in swarms." 
1842. Kentucky. — Northwest corner of State, about Paducah and adjacent counties 
in the south, in 1829, 1842, 1855, and again in 1868. 
1842. Alabama. — Russell and adjacent counties on the east side of Black Warrior 
River, in 1842, 1855, and again in 1868. 
1842. Louisiana. — Morehouse Parish, Caddo, Claiborne. Washila, and adjacent 
parishes, in 1855, and again in 1868. 
1842. Arkansas.— AW the northern counties in 1842, 1855, 1868. 
1842. South Carolina. — Chester district and all adjoining to the Georgia line and to 
North Carolina north[ward] in 1816, 1829, 1842, 1855, 1868. 
1842. Tnifussce. — Montgomery, Bedford, Williamson, Rutherford [and adjacent 
counties], in 1842, 1855, and again in 1868. 
1842. GVorf/m.— Cherokee County in 1816, 1829, 1842, 1855. 1868. 
1842. Xnrlh (V//o/(;ja.— Mecklenburg County in 1816, 1829, 1842, 1855, 1868. 
171) 
