3S FIRST ANNUAL REPORT OF 



the western part of North Carolina, and Dr. Smith, in Wheeling, Vir- 

 ginia, in 1S')0, '47 and T>4. The distance between the localities given 

 is very great, and it is doubtful whether all these records belong to 

 one and the same brood. 



BROOD Xyin Tre&eim— 1868, 1881. 



In the year 1SS1, and at intervals of 13 years thereafter, they will, 

 in all probability, appear in Southern Illinois, throughout Missouri, 

 with the exception of the northwestern corner, in Louisiana, Arkan- 

 sas, Indian Territory, Kentucky, Tennessee, Mississippi, Alabama, 

 Georgia, and North and South Carolinas. 



Though, as already stated, I published the first account ever given 

 of the existence of a 13-year brood, yet, besides the others mentioned 

 in this chronology, this particular brood has been traced since, as 

 having occurred in the years 1816, '29, '42, '55 and '68; and Mr. L. W. 

 Lyon, at the July (186S) meeting of the Alton, (Ills.) Horticultural 

 Society, even mentioned its appearance in 1803. 



In Missouri, it occurs more or less throughout the whole State 

 with the exception of the northwest corner that is bounded on the 

 east by Grand river, and on the south by the Missouri river.* The 

 southeast part of the Slate, where Dr. Smith has recorded it since 

 1829, is most thickly occupied. 1 enumerate those counties in which 

 there is undoubted evidence of their appearance during the present 

 year (1868) viz.: Audrain, Bollinger, Benton, Clarke, Chariton, Calla- 

 way, Cooper, Cole, Franklin, Gasconade, Iron, Jefferson, Knox, 

 Lewis, Marion, Macon, Morgan, Moniteau, Tike, Phelps, Pulaski, 

 Polk, Pettis, Schuyler, St. Charles, St. Louis, St. Francois, St. Clair, 

 Warren, and Washington. * 



It not improbably overlaps some of the territory occupied by 

 the septemdeoim Brood XIV, but I do not think it extends into 

 Kansas. 



In Illinois it occurs more or less throughout the whole southern 

 half of the State, but more especially occupies the counties from the 

 south part of Adams county along the Mississippi to the Ohio, up the 

 Ohio and Wa ! ash rivers to Edgar county, and then across the centre 

 of the State, leaving some of the central counties in South Illinois 

 unoccupied. To be more explicit, I enumerate all the counties in 

 which it undoubtedly occurred during the present year (1868): 

 Adams (south part, back of Quincy), Bond, Clinton (northwest corner, 

 adjacent to Madison), Champaign, Coles, Crawford, Cumberland. (May, 

 Clark, Edwards, Edgarf (especially in the eastern part), Franklin, 

 Gallatin, Hardin, Hamilton, Johnson, Jasper, Jersey, Jefferson, Law- 

 rence, McLean (east end), Macon, Madison, Marion, Massac, Monroe, 



*As Mr. Win. Raucher, of Oregon, Holt county, saw a few individuals in the northeast part 

 of Buchanan county in 1855, it may occur in small numbers in districts even north of the Mis- 

 souri river. 



| Eilgar county also has the septemdecim Brood III. 



