THE AMEEICAN ENTOMOLOGIST. 



71 



Mr. L. "\V. Lyon, at the July (18G8) meeting of 

 the Alton (Ills.) Horticultural Society, even 

 mentioned its appearance in 1803. 



In Illinois it occurs more or less thi'oughout 

 the whole southern half of the State, but more 

 especially occupies the couuties from the south 

 part of Adams county along the Mississippi to 

 the Ohio, up the Ohio and Wabash rivers to 

 Edgar county, and then across the center of the 

 State, leaving some of the central couuties in 

 south Illinois unoccupied. To be more explicit, 

 we enumerate all the couuties in which it un- 

 doubtedly occurred during the present year 

 (1868): Adams (south part, back of Quincy), 

 Clinton (northwest corner, adjacent to Madison) , 

 Champaign, Coles, Crawford, Cumberland, Clay, 

 Clark, Edwards, Edgar* (especially in the east- 

 ern part), Franklin, Gallatin, Hardin, Hamilton, 

 Johnson, Jasper, Jersey, Jeflerson, Lawrence, 

 McLean (east end), Macon, Madison, Marion, 

 Massac, Pike, Perry, Piatt, Pope, Richland, 

 Sangamon, Saline, St. Clair, Union (northeast 

 corner), "Washington, Wayne, Wabash, "William- 

 son, and White. There were none the present 

 year, either at Decatur in Macon county, atCen- 

 tralia in Marion county, or at Pana in Christian 

 county; nor were there any at Bloomington or 

 Normal, in McLean; nor in Dewitt county, 

 which lies south of McLean ; nor in Spring Creek, 

 Iroquois county, which is northeast of Cham- 

 paign. 



In Missouri it occurs more or less throughout 

 the whole State, with the exception of the north- 

 west part, extending east to Grand river and 

 south to a little below the Missouri river. We 

 enumerate those couuties in which we have un- 

 doubted evidence ot their appearance during the 

 present year (1868) viz. : Audrain, Bollinger, 

 Benton, Clark, Chariton, Callaway, Cooper, 

 Cole, Franklin, Gasconade, Iron, Jefferson, 

 Knox, Lewis, Marion, Macon, Morgan, Moni- 

 teau, Pike, Phelps, Pulaski, Polk, Pettis, Schuy- 

 ler, St. Chai-les, St. Louis, St. Francois, St. 

 Clair, Warren, and Washington. 



It is not improbable that this brood overlaps 

 some of the territory occupied by the sepfem- 

 decim Brood X. Whether it extends into Kan- 

 sas or not, we have not ascertfiiued ; but, east of 

 the Mississippi, it occupies more or less terri- 

 tory in the States of Kentucky, Tennessee, Jlis- 

 sissippi, Alabama and Georgia ; while, west of 

 that river, it occurs in Louisiana, Ai-kansas, and 

 Indian Territory. In the country west of the 

 Mississippi, and iu Louisiana, Tennesscef, Mis- 



• Edgar county also has oui' aeplemdecim Brood UI. 



t Though they occurred iu large numbers in Daviilson 

 county and other portions of Tenuessee iu 1855, and also the 

 preeeut year, yet in Lawrence county they appeared in 185fi, 

 instead of 1S55— another instance of a belated brood. 



sissippi, Alabama, and Kentucky, we have good 

 evidence of the tredecim character of the brood 

 which has appeared in those States the present 

 year, while we have nothing to prove that a 

 septemdecim brood ever occiu's in those States. 

 But it is quite different in Ohio, Indiana, and 

 Georgia. In Ohio alone they have no less than 

 SIX undoubted broods of septemdecim, namely, 

 our Broods VI, IX, X, XI, XIV, and XVI; 

 while, as we shall show in Brood XVI there 

 is no evidence of a tredecim brood there. 

 So in Indiana there is no evidence of a 

 tredecim brood, though one m.aii be discov- 

 ered in future. In Georgia, on the other hand, 

 they ill all probability have both our tredecim 

 Brood XIII, and our septemdecim Brood XVI; 

 for, while Fitch records their appearance 

 there in 1851, the correspondent to the Depart- 

 ment of Agriculture from Atlanta, in the 

 monthl}' report for July, 1868, says of their ap- 

 pearance there the present year: -'The 13-year 

 locust appeared in May, and disappeared the 

 first week in June.'" 



IJKOOD XIV .—Scptcmdeci,n—lS(iR, 1SS3. 



In the year 1883, and at intervals of 17 years 

 thereafter, they will, in all probability, appear 

 in western New York, western Pennsylvania, 

 and eastern Ohio. 



This is the 2nd brood of Dr. Fitch, and has 

 been recorded in 1832, 1849, and 1866; and we 

 have ourselves many records of its appearance 

 in 1866. In some parts of Xew York there must 

 have been precui'sors to this, as there have been 

 to other broods, forT. T. Sonthwick, of Manlius, 

 Livingston county, iu western Xew York, re- 

 cords their appearance there in 186.5; while they 

 appeared during the same year near Cayuga 

 Lake, New York, as will be seen by referring to 

 the Prairie Farmer, vol. 16, p. 2. 



nilOOD XV.— Septemdecim— ISIil, 1S84 



In the year 1884, and at intervals of 17 years 

 thereafter, they will in all probability appear in 

 certain parts of North Carolina and Central Vir- 

 ginia. In 1850 and 1867 they appeared near 

 Wilkesboro, N. C, and were also in Central 

 Virginia during the last mentioned year. 



Dr. Harris (Inj. Insects, p. 210) records their 

 appearance at Martha's Vineyard, Massachusetts, 

 in 1833. We have made some inquiry, but have 

 not yet learned that they were there either iu 

 1850 or in 1867. Hence we should rather infer 

 that Dr. Harris's informant must have been 

 mistaken. 



BROOD XVl.—Scptemdeciiii^miS, 1883. 



In the year 1885, and at intervals of 17 years 

 thereafter, they will in all probability appear on 



