40 FOSSIL BUTTERFLIES. 



our PI. I, fig. 5, which, as well as fig. 2, is taken from the originals of my 

 former plate. 



Tertiaries of Aix, Provence, France; Museum of the city of Marseilles. 



MTTMPHALES NAJADES PR.2EFECTI. 

 ETJGONIA HUBMEII. 



Fore wings considerably more than half as long again as broad, the costal 

 border scarcely bent at a little distance from the base, beyond that nearly 

 straight to an equal distance from the tip, where it becomes more curved; 

 outer border with the portion above the middle of the lower subcostal interspace 

 very slightly concave, having a general direction at a very little less than a 

 right angle with the central portion of the costal border, beyond suddenly reced- 

 ing at a little more than a right angle to the middle of the subcosto-median inter- 

 space, and continuing in a deep crenulate curve to just below the lower median 

 nervure, where a prominent rounded tooth is found, and below which the border 

 is excised, its angle rounded off; inner border very nearly straight, scarcely 

 convex on the basal two-thirds. First superior subcostal nervule emitted a little 

 beyond the middle of the outer two-thirds of the upper margin of the cell; the 

 second a little more than half way from the origin of the first to the tip of the 

 cell; the third midway between the tip of the cell and the origin of the fourth; 

 the latter at three-fifths the distance from the tip of the cell to the apex of the 

 wing; second inferior subcostal nervule arising scarcely one-third way down the 

 cell; the cell considerably less than half as long as the wing, and three times 

 as long as broad; middle of the basal curve of the last median nervule connected 

 with the vein closing the cell. 



The butterflies of this genus, which are generally above the average size, 

 strongly resemble those of the genus Polygonia, in the form, color and design 

 of the wings, but on the upper surface of the fore wings the costal markings 

 are much heavier. 



The above characters are wholly drawn from recent species of the genus. 



