58 THE PERIODICAL CICADA, 
brood therefore rests practically on the data secured in earlier years. 
Reports came from eleven counties in [linois—all, however, included 
in the region designated below—and from several of the counties in 
other States, where they were expected. The italicized counties are 
confirmations of old records. 
The distribution by States and counties follows: 
Intrvors.—All northern counties from Mercer southeast to Peoria, to Logan, Shelby, 
Edgar, including Lee, Dekalb, Dupage, Kane, McLean, Rock Island, ete. 
Inp1ana.—Lake, Laporte, Porter. 
Towa.—Allamakee, Benton, Blackhawk, Bremer, Buchanan, Cedar, Chickasaw, 
Clayton, Clinton, Delaware, Dubuque, Fayette, Howard, Iowa, Jackson, Johnson, 
Jones, Linn, Thetis. Mitchell(?), Muscatine, Scott, Tama, iene dee <(?). 
Kenrucky.—Lincoln. 
Marytanp.—Baltimore, Frederick. 
Micuican.—Berrien, Bench Cass, Hillsdale, Oakland(?), St. Joseph, Wayne) 
PENNSYLVANIA. pent aster. 
VIRGINIA.—Lee. 
West Virarnta.—Lincoln, Putnam. 
Wisconstn.—Crawiord, Dane, Grant, Green, Iowa, Jefferson, Lafayette(?), Mil- 
waukee, Richland, Rock, Sauk, Walworth, Waukesha. 
Broop XI V—Septendecim—1923. (Fig. 17.) 
This brood, so far as our records go, is the one which was first 
observed by the early European colonists on this continent. Two 
important areas occur in eastern Massachusetts, one about Plymouth 
and the other covering Cape Cod. The Plymouth swarm of 1634, 
the first after European settlement, was noted by the early Puritans 
and is referred to in the two earliest published notices of this curious 
insect. (See Bibliography.) One of these records gives the definite 
date of 1633, but, as shown by the subsequent appearances of the 
swarm, this date is probably an error for 1634. No published records 
have been found of the later appearances prior to 1789, but definite 
records have been made of each return since that year. An interest- 
ing account of the last appearance (1906) of the Cicada in Plymouth 
County is given in a report received from Martha W. Whitmore, 
Chiltonville, Plymouth, Mass. The near-by Barnstable colony was 
also most abundant last year (1906) all along Cape Cod. As reported 
by Miss Grace Avery, of Washington, D. C., the ground along the 
coast was covered with the dead bodies and the trees in the forests 
were all fired and brown from the egg-laying of the females. 
Prof. H. T. Fernald reports (letter September 26, 1906) the dis- 
tribution in Plymouth and Barnstable counties as in the following 
towns: Plymouth, Wareham, Bourne, Falmouth, Sandwich, Mash- 
pee, Barnstable, Yarmouth, and Dennis, being most abundant in 
the three first named. 
This brood, like Brood VI, covers a very wide range, extending 
from Massachusetts westward to Illinois, with important groups of 
