30 THE PERIODICAL CICADA. 
Brood XVII.— Septendecim— 1898. (Fig. 4.) 
Our Brood XVII is Brood No. 7 of Fitch and XII of Walsh-Biley. 
In Circular No. 30, second series, of this Division, Mr. Schwarz describes 
its distribution as now known as follows : 
This brood covers a vast area from Wisconsin in the West to New York in the 
East, and along the Allegheny Mountains to North Carolina, but the comparatively 
few localities on record are more widely scattered and isolated from each other than 
in any other 17-year brood. It seems more than probable that our knowledge of 
the extent of the brood is very imperfect, so that nothing can be said at present 
regarding the relation of this brood to other broods. Of the localities mentioned 
above, Summit and Yinton counties, Ohio, as well as Ohio County, W. Va., are 
probably incorrect, the records being apparently based upon stragglers of Brood 
XV (1880-1897), which appears always one year before Brood XVII. The reported 
occurrence of the periodical Cicada along the northern slope of the Big Horn Moun- 
tains of Montana and Wyoming is probably based upon a confusion with some other 
species of Cicada. 
The distribution, by States and counties, is as follows: 
Illinois. — Douglas. 
Michigan.— Cass (?). 
New Jersey. — Essex. 
New York. — Richmond (Staten Island), Westchester. 
North Carolina. — Western portion (no specified localities). 
Ohio.— Ashtabula, Summit (If), Yinton (??). 
Pennsylvania. — Dauphin, Lancaster, Northampton (and adjoining counties), Phila- 
delphia (Germantown), Westmoreland. 
Virginia. — Smyth. 
West Virginia.— Ohio (Wheeling) (??). 
Wisconsin. — Columbia, Dane, Green Lake, La Crosse, Marquette (?), Sauk. 1 
Brood VII.— Tredecim— 1898. (Fig. 4.) 
This brood is Fitch's Brood No. 5 and Brood V also of Walsh- Riley. 
Mr. Schwarz describes its distribution as now known (Circular No. 30, 
second series, Division of Entomology) as follows: 
Of the various 13-year broods that are recorded, only two are of large extent, 
Brood XVIII (1881-1894-1907) and the present brood. Both occupy the Mississippi 
Valley from northern Missouri and southern Illinois to Louisiana, but while Brood 
XVIII occurs also in many other localities throughout the other Southern States as 
far east as Virginia, the present brood seems to be confined to the Mississippi Valley, 
with the exception of a detached area in Georgia, which, however, has never been 
confirmed beyond doubt. In the Annual Report of the U. S. Department of Agri- 
culture, the geographical distribution of Brood VII has been discussed and illus- 
trated by a map. Since that year very little additional information has been 
obtained. The only locality in Indiana (Posey County) rests upon a record received 
in 1885, and is, in all probability, not correct. There is also a vague report, received 
in 1885, of the occurrence of this brood in Saint Clair County, Ala. 
The distribution, by States and counties, is as follows: 
Arkansas. — Arkansas, Chicot, Columbia, Cross (and adjacent counties), Desha, 
Franklin, Izard, Jackson, Jefferson, Marion, Mississippi, Phillips, Prairie, Pulaski, 
Saline ( %), Searcy. 
'Reported this year from Burk, Caldwell, Macon, McDowell, and Lincoln counties, 
N. C; Oconee County, S. C; Champaign and Delaware counties, Ohio; Cecil and 
Montgomery counties, Md. ; Fairfax County, Va., and the District of Columbia. A 
summary of the records for 1898 is appended to this bulletin. 
