18 THE PERIODICAL CICADA. 
three degrees above this line, while the 17-year broods descend below it 
in several places, the two races sometimes occurring in the Carolinas. 
Thus the two races sometimes occupy the same territory; while two 
broods of the same race, appearing in different years, may also overlap 
one another, as in the instance given in the account of Brood XXII, in 
Virginia, where the ‘ locusts” appear every eighth and ninth year. In 
order to make the subject as clear as possible, and to facilitate refer- 
ences, [have retained the numbering of the different broods given in 
1868 in accordance wiih the sequence of their appearance from and after 
that date. 
Broovp 1I,.— Septendecim—1869, 1886. 
In the year 1869, and at intervals of seventeen years thereafter, they will, in all 
probability, appear in the valley of the Connecticut River. According to Dr. Asa 
Fitch (N. Y. Rep., I, p. 40), they appeared there in 1818 and 1835, and according to 
Dr. Smith, they occurred in Frauklin, Bristol, and Hampshire Counties, Massachv- 
setts, in 1767, 1784, 1801, 1818, 1835, and 1852. 
1869.— The genuineness of this brood was fully established in 1869, 
as its appearance in Connecticut that year was recorded by several 
different journals (Amer. Entomologist, I, p. 244), and in Massachusetts 
by a recent communication to the publishers of the Scientific American 
from a correspondent at Fall River who unfortunately omitted to sign 
his name. He observed the Cicadas at Freetown, near Fall River, in 
the years 1818, 1855, 1852, and 18€9, and adds: ‘“ In 1818 they were very 
numerous; in 1852 still less; and in 1869 they were quite scattering in 
comparison with 1818.” Mr. George H. Hathaway, of Fall River, also 
confirms their appearance during the same years. 
Broop II.— Tredecim—1882, 1895. 
In the year 1869 they will in all probability appear in Georgia, in Habersham, Ra- 
y S Sila, ’ 
bun ?, Muscogee, Jasper, Greene, Washington, and adjacent counties, haying ap- 
peared there in 1843 and 1856, according to Dr. Smith. 
b) cao] 
1869.—True to time, this brood appeared in great numbers, in 1869, 
in the northwestern part of Georgia, as I was informed by Mr. A. R. 
McCutchen, of Lafayette, Walker County, in that State. There is a 
great deal of evidence, however, which goes to show that it 1s the 17- 
year Brood X XII which occurs in the northeastern counties, and Mr. 
George P. Kollock, of Clarksville, Habersham County, wrote that the 
‘‘locusts” were not there in 1869, but that they swarmed in 1868 and 
1851. This 17-year brood seems to confirm Dr. Fitch’s statement (N. 
Y. Report, 1, p. 40) regarding the extent of his fourth brood, and it is 
further confirmed by the testimony of Mr. D. C. Sutton, of Lafayette, 
Ga., who wrote me on June 30, 1874, that “the 17-year brood of Haber- 
Sham and the northeastern counties occurred in 1868, simultaneously 
with the 13-year brood [X VLII] of Walker County, and the northwest- 
ern part of the State. 
