DEBIS I. 



about one tree, sitting on the trunk, tlying up and away a few feet, and returning to same tree, apparently 

 jilaying with each other. At tlie same time the great body of the butterflies seemed content with resting in 

 the full sunlight on the tops of the leaves. 



" Some trees seemed to have more attraction than others. I remember a certain hickory where I could 

 always find some of the butterflies sitting on the trunk. 



" Plenty as Portlandia was there, not one did I ever find outside this acre, not even in the piece of wood in 

 which it was enclosed, or in any other part of Seneca County." 



I also have had a few lines from Mr. Behrens, in which he asserts that the larger Chionobas of the Pacific 

 coast have no such habit of settling on the trunks of trees, as I had conjectured might be the case from an 

 expression in one of his old letters. 



DEBIS I. 



EXPLANATION OF THE PLATE. 



Portlandia, Figs. 1, 2 <J, 3, 4 ?. 



a Egg, magnified. 



b Young Larva, side view ; h^ back, magnified. 



Ifl Iiead ; i* segment 2 ; U" last segment ; ¥' hairs, magnified. 



c Larva after 1st moult ; c" head; c° dorsal vievr of one of the middle segments, magnified. 



d Larva after 2d moult. 



e Larva after 3d moult. 



/ Larva after 4th moult ; /^ head ; f^ middle segment ; f* end of 13, magnified. 



g Mature Larva after Stli moult, nat. size, 



jr^ head of same, magnified. 



h Larva suspended for pupation. 



