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. 



IBTYMPHALES NAJADES PRJEFECTI. 



EUGONIA HOiiNEii. 



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-medinn inter- 

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

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

 is excised, its angle i-onnded 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 onter two-thirds of the iippcr 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 si/e, 

 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 marking^ 

 are much heavier. 



The above characters arc wholly drawn IVom recent species of the genus. 



