XX TABLE OF CONTENTS. 



Page 



Genus Pamphila ^^^'^ 



Excursus LXI. What Families of Plants are preferred by Caterpillars r . . . . 1567 



Pamphila mandan 1569 



Genus Amblyscirtes 1575 



■ Excursus LXII. Color Relations of Chrysalids to their Surroundings 1578 



Amblyscirtes vialis 1582 



Amblyscirtes samoset 1589 



Genus Poanes 1592 



Excursus LXIII. Butterflies as Botanists 1594 



Poanes niassasoit 1597 



Genus Phycanassa 1600 



Excursus LXIV. Postures at rest and asleep 1602 



Phycanassa viator 1604 



Genus Atrytone 1607 



Excursus LXV. The Enemies of Butterflies 1610 



Atrytone logan 1614 



Atrytone zabulon 1617 



Genus Hylephila ' 1625 



Excursus LXVI. Seasonal Bimorphism 1627 



Hylephila phylaeus 1630 



Genus Erynnis 1634 



Excursus LXVII. The Costal Fold and Discal Streak of Skippers 1639 



Erynnis sassacus 1641 



Erynnis manitoba 1646 



Erynnis metea 1650 



Erynnis attains 1653 



Genus Atalopedes 1656 



Excursus LXVIII. Flight in Butterflies 1659 



Atalopedes huron 1661 



Genus Anthomaster 1667 



Excursus LXIX. Butterfly Vision 1669 



Anthomaster leonardus 1673 



Genus Polites 1678 



Excursus LXX. Sexual Diversity in the Form of the Scales 1681 



PoUtes peckius 1683 



Genus Thymelicus 16S9 



Excursus LXXL The Act of Pupation 1693 



Thymelicus aetna 1696 



Thymelicus brettus 1701 



Thymelicus mystic 1705 



