vi TABLE OF CONTENTS. 



Paoe 



Genus Tbccla ' ■ 868 



Excursus XXXI. Seiual Ditersiti/ in Legs, IVings, and Scale Arrangement . . . 8?2 



Tliccla outario 875 



Thccla liparops 877 



Tliccla calanus 885 



Thecla edwardsii 892 



Tliccla acadica 898 



Tribe Lycaenidi 902 



Geuus Evcres 905 



Excunsus XXXII. Length of Life in Butterflies 909 



Everes comyntas 911 



Genus Cyaniris 918 



Excursus XXXIII. Digoneutism in Butterflies ; Intensity of Life in America . . 923 



Gyauiris pseudargiolus 927 



Genus Nomiades 948 



Excunsus XXXIV. Origin of Varieties in Butterflies, Possible and Probable . . 950 



Nomiades couperi 953 



Genus Rusticus 957 



Excursus XXXV. The Friends and Associates of Caterpillars 962 



Rusticus scudderii 964 



Tribe Chrysophanidl 970 



Genus Clirysoplianus 972 



Excursus XXXVI. The Distribution of Butterflies in New England 975 



Chrysophanus tlioe 977 



Geuus Epidemia . . 982 



Excursus XXXVII. Ucal Butterflies 984 



Epidemia epixautlie . 985 



Genus llcodcs 990 



Excursus XXXVIII. Psychotogiad Peculiarities in our Butterflies ... 995 



Heodes hyi)ophlaeas 908 



Genus reniscca 1009 



Excursus XXXIX. Periodicity in the Appearance of Butterflies 1014 



Feniseca tarquinius 101 



FAMILY PAPILIONIDAE 1027 



Subfamily Pierinae 1033 



Tribe Rhodoceridi 1040 



Genus Callidryas • 1043 



Excursus XL. Aromatic Butterflies 1047 



Callidryas eubule 1053 



