CONTENTS. 



PAG 3 



Preface , . iii 



lutroductiou 1 



What are Butterflies? 1 



The Structure of the Perfect Insect or Imago . . . . , 2 



The Appearance of the Egg . 5 



What the Caterpillar is like 6 



The Character of the Chrysalis 7 



A Few Words about the Eggs 8 



The Lives aud Habits of Caterpillars 9 



How the Chrysalis Hangs 12 



The General History of Butterflies 14 



Variation in the Butterfly 15 



Some Remarkable Differences between the Sexes .... 20 



The Senses of Butterflies 22 



Mimicry and Protective Resemblance 23 



The Classincation of Butterflies . < . . 25 



Some Works on American Butterflies . 27 



Keys to the various Groups 3;} 



Key to the Groups, based on the Perfect Butterfly . . ■ . . 34 



Key to the Groups, based on the Caterpillar 45 



Key to the Groups, based on the Chrysalis 53 



Nomenclature of the Parts of the Wing 60 



The Commoner Butterflies of the Northern United States and 



Canada 63 



Family Brush-footed Butterflies 63 



Subfamily Danaids 63 



Genus Anosia 63 



Anosia piexippus 63 



Subfamily Nymphs 66 



Tribe Crescent- Spots 66 



Genus Euphydryas 66 



vu 



