Xviii TABLE OF CONTENTS. 



Pags 



Genus Xanthidia lUGl 



Excursus XLI. The Colonization of New England 1064 



Xautbidia nicippe 1066 



Genus Eurema 1073 



Excursus XLII. The Swarming and Migrations of Butterflies 1077 



Eurema lisa 1087 



Genus Eurymus 1096 



Excursus XLIII. Color T references of Butterflies; the Origin of Color in Butterflies 1101 



Eurymus interior 1105 



Eurymus philodice 1111 



Eurymus eurytlieme 1126 



Tribe Anthocharidi 1137 



Genus Authocharis 1139 



Excursus XLIV. Protective Coloring in Caterpillars 1143 



Anthocharis genutia 1147 



Tribe Pieridi 1154 



Genus Pontia 1156 



Excursus XLV. Cosmopolitan Butterflies 1160 



Pontia protodice 1163 



Genus Pieris 1171 



Excursus XLVI. The Spread of a Butterfly in a 7iew Region (with a map) . . . 1175 



Pieris olcracea 1191 



Pieris rapae 1205 



Subfamily Papilioninae 1219 



Genus Laertias 1230 



Excursus XL VII. A Study of Certain Caterpillars 1234 



Laertias philenor 1241 



Genus Iphiclides 1252 



Excursus XLVIII. The Butterfly in Ancient Literature and Art. By C. H. B. . 1257 



Iphiclides ajax 1264 



Genus Jasoniades 1280 



Excursus XLIX. Melanism and Albinism 1285 



Jasoniades glaucus 1288 



Genus Euphoeades 1305 



Excursus L. Deceptive Devices among Caterpillars ; or, the Defences of Caterpillars 1310 



Euphoeades troilus 1313 



Genus Heraclides 1327 



Excursus LI. Southern Invaders 1332 



HeracUdes cresphontes 1334 



