34 THE PERIODICAL CICADA. 
The records of subsequent appearances, however, have shown the date 
mentioned to have been unquestionably an error for 1832, which refers 
the swarm to Brood XX. 
The distribution, by States and counties, is as follows: 
North Carolina. — Alleghany and Wilkes. 
Ohio.— Medina (?). 
Virginia. — Bland, Craig, Franklin, Giles, Grayson, Henry, Loudoun, Montgomery, 
Pulaski, Roanoke, Smyth. 
West Virginia. — Greenbrier, Monroe, Raleigh, Summers. 
Brood X.— Tredecim— 1901. (Fig. 7.) 
The existence of this brood rests on the single statement of Dr. 
Gideon B. Smith, to the effect that he was informed that the insect 
appeared in vast numbers in parts of Texas in 1819, but that he was 
unable to get any particulars. No confirmation of the occurrence of 
this brood in Texas was gained either in 1875 or in 1888. Its existence, 
therefore, at least in Texas, is very doubtful. 
Dr. D. L. Phares furnishes a record of the occurrence of Cicadas in 
Louisiana in 1875, as follows : 
About the 10th of June, coming up the Mississippi River from New Orleans, at 
Bayou Sara, I heard of a family of Cicadas in West Feliciana Parish, La., no:ir the 
river and south of Bayou Sara. I requested the gentleman to get what history he 
could of them and send me specimens. I have received nothing from him except 
the specimens I send herewith — all dwarfs, or perhaps a distinct variety. 
Dr. Eiley says of these specimens that they can not be assigned 
either as precursors or belated specimens to any one of the recorded 
broods, unless to this Brood X, of which they may possibly be the 
eastern outpost. 
The records for this brood, therefore, are the doubtful one from Texas 
and the positive one from Louisiana, having a very doubtful connection 
with the Texas swarm, if the latter exists. 
Brood XXII.— Septendecim— 1902. (Fig. 8.) 
This is the largest of the 17-year broods, and equals if not exceeds 
in extent the largest 13-year brood, namely, Brood XVIII, with which 
it appeared in conjunction in 1868. It is Brood No. 4 of Dr. Fitch 
and XYI of Walsh-Riley. It has been well recorded, particularly in 
tlie East, from 1715 to 1885, the date of its last appearance. On this 
year (1885) it was associated with the 13-year Brood VII, tlie second 
largest 13-year brood, and the districts covered by the two touched or 
perhaps overlapped at several points. Early in that year Professor 
Riley issued a circular calling attention to the recurrence of these two 
broods and asking to be informed of the localities of their appearance. 
The replies to this circular were numerous, and the present distribution 
of the two broods is largely based thereon, supplemented, however, by 
all the old records. The localities based on the latter not confirmed in 
1885 are given as doubtful, except where there is no reason to question 
the record. 
