24 [July 



have never seen them, and the outer border of the middle band is that 

 of rather a peculiar variation, the exact counterpart of which I do not 

 remember to have noticed unless when accompanied by grayish mark- 

 ings toward the outer border, entirely absent in this figure; somethiny 

 near it, however, is seen in those forms which show most resemblance 

 to C. Oeno. 



The description given by Harris in the posthumous edition of his 

 work on Injurious Insects is inaccurate in stating that the male diflPers 

 from the female in having the wings -paler and with more of an ochre- 

 yellow tint." The figure is quite good for a wood cut, but the mark, 

 ings of the outer half of the secondaries beneath are too coarsely repre- 

 sented, and the specimen from which it was figured, probably furnished 

 by myself, unfortunately again represents one in which the inner mar- 

 gin of the middle band, and the whole basal field is quite obscured by 

 blackish ; the outer margin of the middle band is well represented and 

 normal. 



The figure given by myself in my paper on the Insects of the White 

 Mountains is much more satisfactory, and, indeed, leaves little to be 

 desired that could be given in a plate of that kind. One or two points, 

 however, may be mentioned : it is exceedingly seldom that specimens 

 are seen with a narrow black band between the middle band and the 

 base of the wing on the under side of secondaries; the inner margin of 

 the middle band has in the figure an unusually shallow depression on 

 the median nervure not nearly reaching its first branch ; the outer 

 margin of the same is not bent so abruptly as usual, and extends even 

 further than usual up the costal border ; and lastly, the upper side of 

 primaries should not have so distinct a lighter outer half since the color 

 is nearly uniform, but the outer half should be represented as dark as 

 the base ; in the secondaries the diaphanous markings of the under 

 side make the diflFerence. 



Dr. Behr having expressed (Proc. Calif Acad. Nat. 8c. III. 165) 

 his doubts about the feeding plant of Chionobas semidea, in consequence 

 of some indefiniteness in my statement that they fed on a lichen ( Pel- 

 tu/era canina Hofi"m.). I will state what I know in regard to them more 

 explicitly. I have never found more than six or eight specimens, and 

 of these not more than half alive; those found alive were always found 

 upon this fleshy lichen, but were never seen actually eating it, though 

 if my memory serves me aright,* the lichen in one case had been eaten 



*I did not then know the possible doubt of their feeding on anything else 

 than Monocotyledons, as set forth by Dr. Behr. 



