CONTENTS 
METHODS te ss ctu suis Goes Oe epee s leat pe cae enc 3 
DESCRIPTION “ORSAREA Ge ouae. cee ey ee ec Mears co 4 
Historian. RESUME ..4s, 0.54002 02) eee ge 4 
SOURCES AND ACKNOWLEDGMENTS... 05. +--+ 0 50 a= > 2) 92> "sng 7 ha 4 
BUTTERFLIES OF ILLINOIS 5.5.0 02000 646 ee eee on ee ani 5 
Hesperiidae... spi oun siden: «oe Ee Seas cee 5 
Papilionidae ......+ 0s yncer ess ues s+ Hens ate enc ac 14 
Pieridae co. cc Gec ce ceo e bac ue 65 igs cigs wie oe aim = cher Ceo: tensa a a 15 
Riodinidae ....6a weaves Dee en. cate gles seine 19 
Lycaenidae ©. ...26 6 ceca uy eine nets el 19 
Liphyridae <0 525. c.0ce cose senses + vate Bete iss 77sec 24 
Libytheidae . 26.2. 660.05. bee eee ys ed Es 1 a 24 
Nymphalidae c2..0 6. 0s bebe ens eens ate reels 7a = sal 24 
Danaidae .. cc cesecs scene sme ee ere ee owen ss + nina eesti ec 31 
Satyridae: soc... vescee ery eee ices sas ots AP Sse lae elas eh! 
BuTTERFLIES OF PossIBLE OCCURENCE IN ILLINOIS ....-- +--+ +sserecttcttett 33 
Hesperiidae ..c.0e.: cnc. cane tess tet te eee tees tia ie 33 
Papilionidae 4.15.0. 50005 v2 eyes Senne ieeie oa tele oe ole 34 
Pieridae 6.5 cu vce es oh q ates ibe Gh 0 slg sie gue'e pte tree) ec 34 
Riodinidae ’sé ass ene we her ad ase e Soe a segs tee oh ee eee 35 
Lycaenidae .....5.++een: sete teeter cee se ao ha 35 
Nymphalidae ..... 6120s. 4e20 ces te none ree =: aia a 35 
ERRONEOUS REGORDS «¢c2 00-2050 amc eu oo ohm cieie etic mie) cele» Saisie 36 
LITERATURE CITED «.... 2 oso nd ene tos ee on ce tienes foe 9 oye Ea een 36 
FIGURES ccc cle: uae egg dhs oboe bes be 00s cb we ot eee ne saa 41 
Species DISTRIBUTION MAPS .. i... ene ee ce cen ee ences > Oe ee) 44 
