22^ 



Note on the RECURRE^fcE of Brood V of Tibicen' Septendecim 

 IN Porter County, Indiana, During 1905. 



By Walter L. Hahn. 



In the Proceedings of this Academy for 1S98 (p. 225-G). F. M. Webster, 

 writing of the tliree broods of Cicada septendecim found in Indiana says: 

 "Brood y covers only the area over wliich Brood XXII did not occur and 

 does not, so far as I was abk^ to learn, overlap that brood. It covers a 

 small portion of Laporte County and the greater portion of Porter and 

 Lake counties, and Avill reappear next in 1905." That his prediction was 

 fulfilled the past summer, I am able to testify, for although I was not in 

 this region during "cicada time" the evidences of their worli were still 

 abundant in the latter part of August, when I visited soutliern Porter 

 County. 



I am unable to define the limits of the brood, Init saw the indications 

 of its presence about Boone (Jrove and south of that village in the vicin- 

 ity of Aylesworth switch, to within about a mile of the Kankakee River. 



The effect of their work was most noticeable on the red oak trees, 

 whose leaves were everywhere withered and brown to such a degree as 

 to be easily seen at the distance of a mile or more. However, other trees 

 had also been stung and were less noticeable only because their leaves 

 had fallen and new ones had l)een put fortli. The dried bodies and wings 

 of the insects were everywhere abundant in the woods, so that there 

 could be no doubt as to what had done this work, even had I not had the 

 testimony of farmers living in Ihe vicinity. 



•Tibicen, Lalreille, Fatii. Nat., p. 426, 1825. 



