BROOD XXIII 1 RKDKCIM liUl. 
71 
Hu(...l. Will Tn.hnni l!l|l. - I'Il'. I'C,. i 
Tliis is Wnnnl No. :> of Kilcli. Bnxul \ also of \Val>li-l(il(«\. an.l 
Brood \ II of l\il('\. TluMc aic Iwo lar^c lil-ycai- l)i'oo(l>. wliidi 
lionor lirood Will (li\i(l(>s with P)roo(l XIX. .Vs iiidicalcd l)y Mi-. 
wSchwarz in Circular No. ."50, both oi' thcx' hroods occupy ihc Mi-<^i->- 
si|)])i \'all(*\' from nortluMMi Mi.s.souii and sou(h(M-n lllinoi.s to Louisiana ; 
hut while Urood XIX occurs also in many other localities, I)I-om(| 
XXIII is con(in(Ml more strictly to the Mississi})])! \'all(\v I'eirion. At 
the time o( the r(M'urr(Mic(* of this brood in 1898 a very careful inscsti- 
pition was nndertaken by the writer of its distribution. 
S(n'eral thousand n^plies wovo vccvwcd in r(\s])onse to a circular 
l-"l(_.. 2ti.~Mai) showing (ii.slriliULion of Brocxl XXiU. I'.Hl. 
sent out, many of which w^erc negative, the hivestigation beiuLT 
extended throuirhout all States in which there was any likelihood of 
the appearance of the Cicada, and necessarily coverin^^: many counties 
and districts where the Cicada was not suspected. Local investiga- 
tions were also undertaken by the odicial (Mitomologists in several 
States, Professor Forl)es adding four or five new counties for Illinois, 
Professor Oarman adding six counties for Kentucky not pr(>viously 
reported, all in the eastern end of the State, and Professor Stedman 
adding one new county from Missouri. In all three of these reports 
our own records were confirmed foi- nearly every county. The 
results of this canvass up to dune JO were recorded in Bulletin No. 14 
