66 THE PERIODICAL CICADA, 
1893, but an additional and very doubtful locality (Montgomery, Ala. ) 
was reported that year. The records obtained in 1906 added three 
counties for Georgia, six for Tennessee, one for North Carolina, and 
one for South Carolina, but gave again no confirmations of old 
records. The lack of confirmations, however, does not invalidate 
these old records nor necessarily mean the dying out of the swarms, 
as no particular effort was made to get reports from the exact 
localities. 
The distribution, by States and counties, is as follows: 
AnABAMA.—(Lowndes), (Montgomery) (?). 
Grorcta.—(Cherokee), (Cobb), Gordon, Oglethorpe, Screven. 
Fig. 22.— 
ie 
fap showing distribution of Brood XIX, 1907 
NorrH Caroiina.—Anson, (Lincoln), (Moore). 
SoutH CaroLina.—Edegefield.* 
TENNESSEE.—Carroll, Dyer, Lauderdale, (Lincoln), McNairy, Madison, Stewart. 
3RoopD XI X—Tredecim—1907. (Fig. 22.) 
This is the largest of the 13-year broods, and also the best recorded, 
perhaps, from the standpoint of distribution of all the broods. It is 
Fitch’s Brood No. 3, in part, XIII of Walsh-Riley, and XVIII of 
Riley. Its existence has been known since 1803. Its limits were 
most carefully studied by Walsh and Riley in 1868, particularly for 
the Missouri and Illinois localities. As has elsewhere been explained 
(p. 31), there is a possibility that some of the northern counties, at 
