APPENDIX D. 
RECORDS FOR 1898 OF BROODS VII AND XVII. 
A very systematic and thorough canvass was made of all the States 
in which either Brood VII or Brood XVII were expected this year. A 
circular detailing the distribution of the two broods was sent out, with 
reply card, to the regular correspondents of the Division and also to 
the much more numerous correspondents of the Division of Statistics 
of the Department. Between twelve and fifteen hundred replies were 
received in response to the circular, and while most of them were neg- 
ative, many positive records were obtained which very considerably 
extend and modify the knowledge of the range of these two broods. 
The results of this canvass are summarized below by States and 
counties for each brood. The counties marked with a star (*) indicate 
those in which the Cicada was abundant, in many cases several reports 
being received from the same county. In the unstarred counties the 
Cicada was reported in few or scattering numbers, or at least as not 
abundant. This was the character of the records for the most part of 
Brood XVII, in many localities only a few specimens being observed. 
It is quite probable also that the records for Ohio, West Virginia, and 
Virginia in some cases are based on stragglers from Brood XV, which 
occurred in 1897. Dense swarms of Brood XVII were, however, 
reported from the mountain counties of North Carolina, South Caro- 
lina, and Georgia, and the limits of this brood, in this portion of its 
range, are now determined with fair accuracy for the first time. The 
reports from the mountain counties of Tennessee and Kentucky belong 
undoubtedly, also, to Brood XVII. A number of strong swarms of this 
brood are reported in Wisconsin, and several in Illinois. Some of the 
latter may, however, belong to Brood VII. The reports from northern 
Michigan (Chippewa and Houghton counties) and from northern Wis- 
consin (Burnett, Sawyer, and Washington counties) carry the range of 
the Cicada farther north than any of the old records. 
The reports of Brood VII nearly all indicate the occurrence of the 
insect in enormous numbers. Unfortunately, however, there enters 
again with this brood some doubt as to the correct reference of some 
of the localities in Illinois, Indiana, and perhaps northern Missouri, or, 
in other words, where the territory occupied by the two races overlaps. 
In most of the records assigned to this brood, however, in the States 
mentioned the evidence points pretty strongly to the accuracy of the 
reference. When the reference is uncertain a query follows the county. 
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