KNOV/LEDGE 



[July 17, 1885. 



1 W \ Kl.M 



01 ill iht iiunuiin. in 



ij^Tenteen >Lnr Cicada ( 

 •raica,! f >rm d k iiital hook' 



il c, „ Linn) A <? of 

 trBicail f >rm a s iiitai nooks sinking apparatus B <? of 

 '-2hf small f rm (ra. mu) e 1 x mtil hi,k9 Coloura {A) black 

 jrf'iiKWBge and orange brown (L) black and orange 



jrf* 'Till re is t, voluimnimt, bttritiut cu this insect, ind i 

 T -painfull account of it wis ^nen bj the inscnt t\ liter m 

 his "tir-t Report on the Insects of Missouri, just 

 seventeen -^t \rs igo In th it iitick it is mide e-vidtnt 

 that, besides a number of bi -<kK i quu in^' seventeen 

 years for thtir undtrsriouul ch-velopmeiit theie lie 



I -others bel mgmcr to a thirteen ye u r lee oi \ ^i letv, -sThich 

 miiifli called Gi^adx tndeivm 



Oio From the chronolof,ieal record there gi\ en, the brood 

 XXII which is 1 s. \ nt .n \. .1 bidxl md whieh H-^t 



DdJapfuaud m 1^0^ ^M^1 u l i iln unuuei on Lim. 



aM 1 



t 15i , kl^ 



\ 



I 1 ,11 



a -soutli 



3ri+Ulch« n ml \i ^n . 

 Th'^^Stii II Mil lii_ III 111 I I hi 

 to lhn bn. I his 1 , 

 jjiHl^ 1732 174'» 17u' 17 

 ^o y1868 



9JJ - Ihe.tlur brond (li 1 

 /Gwhrood i| 1 I iiid h t 111 1~^7. 

 orfi poUioucflUm i.iukui 

 n m.in. te ind M. si i| | 

 ''iif. It ^mU thus b s , , t I 



extended lie I th 



shaped ti ick of e ii 

 "^ northern limit ui 1 



tlie south, with its s ai 



t Koehestei 



ind m thi 



utluid, Yei 



t Lolumbii 



1, I in the 1 .St 

 .sl7 \t,A l^jl I 



u the sout 

 111 Louis 



1 iin£ra%\edee- 



^Mng tjwaid 

 icichiug northern 



1,11^11 Tilt thiit . u year brood IS loc tted to the south 

 1 ( f till w 1 ind IS much more limitid in t\tent 



ii n 1 iti\ I II 1 f the two broods are indi( itod in the 

 1 ( Tu)i iii\ iii_ 111 11 lliis gives only the localities which 



i\i l)(in full\ Miified, though there iro doubtless 

 imj (itlii 1 foniKcting points between tht separated 



d by hu 



The 1w 



« >ul I SI c ni now hei e to overlap and 

 ( om( m cOut u t witli eooh other, as they are sepanted 

 b} the-wbok extent of uOTthein and etntril Illinois, and 

 nearly tl|e whole State <jf Kentucky They approach 

 each ot)ker most lu C cxir^a 



TJ»ei,ptriodicitj m the aiipeiimcc of thiSuuscct is so 

 constant that the n itur^list cikulvtt^s as e«jnhdently on 

 itf. fttttfre recurrence ixlA given month of a'gjiven year 

 for all feture time is th^stionomei does oTi-^n eclipse or 

 a ti'anfiifc on some partidjlareli-v There is something rither 

 plewant m the feelm.^ th it we niiy go back in mind to 

 some piiticulii di> oil a putieulai >t »■» m the past 

 history df our continent, 1 m^ before oivilnjed man had 

 discovered it, and feel peifect Cdutidencc thii the woods 

 rittled'ftith the hoirse cr^ of thi^s cieid^ in the month of 

 June, ver\ much as thej iie now dmng 



The habits .f this m eet iie briefly given by me in 

 the Western I umeis Aim maek fur IhZS.froaa which 

 I quote - 



'Th( ippi llition of locu t was bestowed upon it by 

 th. I iiU sLttkisrf thiscoimtn fi m m . -rnu, wn^tim 

 tint It ^^^sI.kntlcll ^Mthon. ttli jl.us fl ^ pt 

 r 1 kd inBibheil loie lln i 1 i u li 1 nible 



pisv Ku if th( Furitini 1, ,1 11. II tl, liiiUin. of 



f 1 ' 



IM ' 



ef the 

 These 





t assured that 

 wiither The 

 11 ly be likened 



iro formed of 

 .e folded into 



I the thorax 



•From Ha./: r <. W eUy 



I 11 hment like s 



i .ted in civitie 



I Muscles lie itta. lied internally to these platts by the 



contrlction and relaxation of which the drum heads are 



I alternately tightened and loosened the effect bemg a 



