CHRONOLOGICAL ACCOUNT OF DIFFERENT BROODS. 33 
Across the Missouri River the brood extends into Nebraska as, on 
June 19, 1879, I received from Mr. D. W. Hershey specimens captured 
at Nebraska City. 
From Arkansas reports for 1879 are wanting, but from trustworthy 
testimony we have to add Indian Territory and northern Texas to the 
region occupied by this Brood XIV. From Indian Territory Mr. W. 
S. Robertson, Muscogee Post-Offlce, sent me specimens captured near 
the banks of the Arkansas River, and stated in his letter of June 17, 
1879, “that this brood is entirely confined to the river bottoms, whereas 
another brood appears on the oak and hickory groves on the upland.” 
Unfortunately, Mr. Robertson failed to give any dates for this upland 
brood, but if may possibly be Brood XVIII. The occurrence of the 
brood in northeastern Texas is based upon a letter from Mr. S. R. Ludlow, 
of Valley Creek, Fannin County, dated June 25, 1879, and stating that 
the Seventeen-year Cicadas made their appearance in the “ brush see- 
tion” of his county, about April 20. 
Future observations will no doubt add many other locations for this 
brood in Indian Territory and Arkansas, and thus connect more closely 
the southernmost point of the brood in Texas with the region occupied 
in Misssouri and Kansas. 
Leaving out of consideration the detached locality in central Ohio, 
which has not been confirmed in 1879, and which is based solely upon 
the testimony of Mr. Clarke Irvine, we see that this brood occupies a 
very compact region of the county, its southernmost point being about 
in the same latitude as that reached by Brood XXII in northern Georgia. 
Broop XV.—Septendeciim—1880, 1897. 
In the year 1880, and at intervals of 17 years thereafter, they will, in all proba- 
bility, appear from western Pennsylvania to Scioto River east, and down the valley of 
the Ohio River as far as Lewis County, in Kentucky. 
This brood is recorded in Ohio as far back as the year 1812, by ‘A. M. B.,” writing 
to the Chicago Tribune, under date of June 22, 1868. Harris also records its appear- 
ance in Ohio in 1829, and they were quite numerous in the center of the same State 
in 1846, or during the first year of the Mexican war; while Dr. Smith records it in 
the eastern part of the State, extending over twelve counties west to the Scioto River, 
and to Sandusky, on Lake Erie, in 1829, 1846, and 1863, and in Lewis County, Ken- 
tucky, since 1793. As before stated, this brood occurred in Ohio in 1846, simultaneously 
with the tredecim Brood VII in southern Illinois. Dr. Fitch, in his account of his fifth 
brood, also records its appearance, and states that it reached to Louisiana. But just 
as the septendecim Brood VIII was confounded with the great tredecim Brood XVIII 
in 1855, so this septendecim Brood XV was doubtless also confounded with it in 1829, 
for they both occurred that year. Had the western country been as thickly settled 
in 1829 as it was in 1855, the tredecim Brood XVIII could undoubtedly have been 
traced in southern Illinois and Missouri, &c., in the former as it was in the latter , 
year. This belief is furthermore greatly strengthened from our haying no other 
record of the appearance of this septendecim brood in Louisiana than Professor 
Potter’s statement that they appeared there in 1829; whereas they have occurred there 
since 1829 at intervals not of 17 but of 13 years, and were there the present year, 
[1868], as will be seen on referring to Brood XVIII. The dividing line of these two 
broods (XV and XVIII) is probably the same as with Broods VIII and XVIII. 
15936—Bul. 8 3 
