28 



FOSSIL BUTTERFLIES. 



costal border traverse both wings and must belong to the one to which they cer- 

 tainly belong in part, the front wing. To this Boisduval makes no sort of answer, 

 and Butler, to judge from his silence in the matter, and the comparative illustrations 

 he gives on a plate published subsequently, 1 considers it unproven. All of these 

 writers are, however, entirely wrong in supposing that the under surface of the 

 wings is exposed to view, and that the hind wing covers the front wing. Bois- 

 duval does not distinctly state this; but the whole tenor of his remarks shows that 

 this was the view taken by him; and when Lefebvre says: "Si de Toeil on suit les 

 bords de la seconde aile, qu'avec le Docteur je reconnais couvrir en grande partie 

 la premiere," no objection is offered in Dr. Boisduval's response; nor does he demur 

 to Lefebvre's statement, when the latter speaks of the " face inferieure, celle 

 que nous voyons." As we shall show later, however, the upper surface of the 

 wings is that exhibited on the stone, and the front wing almost entirely conceals 

 the hind one; compare PI. I, fig. 13, drawn anew from the fossil. 



In the same place to w,hich we have just referred Mr. Butler adds the fol- 

 lowing remarks on the probable affinities of this fossil: 2 



The true position of C. sepulta is undoubtedly in the family 8atyridce; and, 

 so far as can be judged from the beautiful figure in the "Aunales," s it is exactly 

 intermediate in character between three nearly allied genera now existing, viz. : 

 Neorina, Antirrhcea and Anckiphlebia, its more immediate allies being the com- 

 monest species in each of the above genera. Its characters are distributed be- 

 tween these three species as follows: 



i Lep. Exot. pi. 4. 

 '-' Lor,, cit., \). I'.iO. 



8 In tliis figure the ueuration has not been -very clearly defined, 

 the. ruining of the himl wings not being: continuous. 



