40 THE PERIODICAL CICADA. 
Broop XIX.—Septendecim—1882, 1899. 
In the year 1882, and at intervals of seventeen years thereafter, they will, in all 
probability, appear in Monroe, Livingston, Madison, and adjacent counties, and 
around Cayuga Lake, in New York. 
Mr. T. T. Southwick, of Manlius, Livingston County, records their appearance 
there in 1865, and, as will be seen by referring to the Prairie Farmer, vol. 16, p. 2, 
they appeared during the same year near Cayuga Lake, while Dr. Smith records their 
appearance in 1797, 1814, 1831, and 1848. 
In addition to the above recorded data, I received a communication 
from Mr. T. E. Hayward, of Pittsford, Monroe County, New York, 
dated February 13, 1878, in which he speaks of this brood as follows: 
‘“‘ It lies wholly on the east side of the Genesee River, and is bounded 
by Lake Ontario on the north and probably Cayuga Lake on the 
east, and extends south 40 or 50 miles to the pine region. You are 
well aware that it occupies the oak and hickory portions only, and of 
course there are whole townships within this space where it is scarcely 
known. This is the 17-year kind, and the first appearance I saw was 
in 1831, the next in 1848, and again in 1865, and of course they will 
put in an appearance in 1882, the very year left blank by all the broods 
then known to exist.” 
1882.—In this year the reappearance of the brood was communicated 
tome by Mr. Simon Forshay, of Penn Yan, Yates County, New York (let- 
ter of July 10, 1882), and the same correspondent furnished later (letter 
of October 9, 1882) the following data: ‘ My means to obtain data in this 
Cicada matter are quite limited, and therefore I can only furnish you 
with the following: There are two districts in this county (Yates), the 
towns of Forrey and Middlesex, where these Cicadas were prevalent in 
great numbers during a part of June and July. Their extent in For- 
rey covered an area of about four square miles, and in Middlesex some- 
what less. These towns or localities are situated at some distance 
from each other, one bordering on Seneca Lake and the other on Can- 
andaigua Lake. I am also informed that these insects were prevalent 
in portions of the counties of Ontario, Livingston, and Wyoming, of 
western New York. Iam not able to learn that they made their ap- 
pearance in any other parts of the State.” 
While there cannot be the least doubt as to the genuineness of this 
brood, its small extent, covering only a few counties in a single State, 
is certainly noteworthy. It is a mere local swarm when compared with 
most other well-established broods of the 17-year race, and other sim- 
ilar swarms of still smaller extent can no doubt be traced in various 
parts of the country; for [have a number of communications testifying 
to the appearance of the Cicada in restricted localities which cannot 
be referred to any of the established broods, not even as precursors or 
belated specimens. It would be premature to establish for every one 
of these locally restricted swarms a new brood, based as they are upon 
a single record, and their consideration is therefore deferred until more 
material has accumulated for a thoroughly revised chronology. 
