160 



have been of the mind that there were two species of these ; 

 also of the true Pygcera., — one ministra, tlie other scarcely 

 distinguishable from it at first. When next in the Museum, 

 I will again look at his drawings. I hope to have a specimen 

 oi Acontia Solaris for you when I send next. Tlie resemblance 

 between this and Eudryas is only an analogy. I mean an- 

 alogy in the sense in which Swainson and MacLeay use it. 



I think I told you that the specimens of Argynnis you 

 sent me are the true Cyhele. AjjJirodite is smaller than the 

 smallest Cyhele I ever saw. Do you ever get Troilus near 

 you ? I have but very poor specimens. I have as yet but bad 

 specimens of P. Glaucus, but hope for more this winter from 

 Wilmino-ton, Del. Wilcox told me it was found at New York. 

 Do you take Thecla Pamo7i Cr. = Smilacis Boisd. ? I have 

 only one which you gave me. I saw it plenty near Cumber- 

 land Gap, Tennessee, but could not then catch any. 



DOUBLEDAY TO HARRIS. 



Epping, Feb. 27, 1841. 



In a box I received the other day from my friend Calverlyare 

 two specimens of a CoUas like to, but distinct from Philodice. I 

 have PJiilodice in all its varieties (Query ; are not some of these 

 species, with Boisduval ?), but none came near to this. It is 

 smaller and has no black border to the under wings, only a faint 

 black tinge along two nervures. Its whole aspect is different. 

 One is an albino, white where it should be yellow, but has a 

 faint yellow tinge towards the inner margin of the anterior 

 wings. I have two or three specimens of this variety of Philo- 

 dice, but all differ much from these two. Both are 9 . The 

 black, discoidal spot on the anterior wings is very distinctly 

 pupilled with white above. It will not agree with any described 

 by Boisduval, in the Suites a. Buftbn. I have a suspicion that 



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