174 



passing the whole summer in Colorado collecting butterflies, that this 

 form could not be Philodice^ and then said, that " if there could be 

 such a thing as a yellow Eiirytheine, this was it." The larvae differ 

 from Philodice very much, and differ also from Eurytheme, in import- 

 ant respects. A large proportion show the sub-dorsal white and red 

 bands, but none the black, and the white band is not macular but con- 

 tinuous, and inside it, not over it, in the continuous red line. 



Eriphyle we do not know in its larval stages, but it differs from all 

 the others in several points; it is also of a peculiar yellow, canary not 

 sulphur nor buff; on under side reddish, and almost destitute of ex- 

 tra markings, often having no trace of them; is without the patch at 

 outer angle; and the discal spot of hind^ wings below is pearl-white in 

 a roseate ring. On upper side this spot is always deep orange. Dr. 

 Hagen, p. i68, takes for his standard my description of and remarks on 

 Philodice, wherein I show that the markings of that species are vari- 

 able, and he claims that " all species which are characterized by differ- 

 ences falling in the wide range of those given in that paper " must be 

 united with " Philodice. 



The range of variable markings mentioned would cover nearly or 

 quite every known species of Colias in one way or other. It certainly 

 would include nearly all the characters found in C. Eurydice S ; and 

 the larva of that species in all stages is near to Philodice — by no 

 means so separated as is the two-banded larva of Hagenii. I know 

 this, for I have bred Eurydice from the ^g% largely the past 

 summer. Yet this species is put by some experienced lepidop- 

 terists in a separate genus, and those who do not admit this put it in 

 a separate group. The markings of Eurydice 3 show that it sprung 

 from the same source as did Philodice, though perhaps a little more 

 remotely, and the curious "dog's head" mark common to Eurydice and 

 Ccesonia, not unfrequently breaks out in Eurythenie, and occasionally 

 a Philodice. This is positive proof of community of descent. 



And now I should like to ask Dr. Hagen how it happens he did not 

 •' unite " Eurythenie with Philodice. He declares that it shows all the 

 marks oi Philodice, and in his comments on C. Christina, p. 163, makes 

 light of orange as acolor, because Scoresby, in 1822, found an example 

 of Palceno in East Greenland which had a tint of orange! and Mosch- 

 ler among hundreds of Pelidne from Labrador, says he came across 

 one orange example, and W. H. Edwards speaks of an orzngt Philodice. 

 (About one example in ten thousand may have a tint.) It seems to 

 me that my ingenious friend should unflinchingly have carried his 

 theory to its logical conclusion, and have " united," as he calls it, 

 Eury theme and Eurydice, and a number of these species with Philodice. 



At the end of the paper we are treating of the Doctor gives us a 

 postscript to tell us that Mr. Keferstein, the well-known veteran of 

 lepidopterologists, has published a paper on Colias,'' etc. That he 

 gives a full classification of the Colias of the whole world. And lower 

 down on the page, says of his classification, ^'■Eurytheme is not united 

 with Chrysothenie j"' as I should expect from a man of such standing 

 as Mr. Keferstein. 



From this statement, any one concerned in these things can discover 



