32 FOSSIL BUTTERFLIES. 



tains in its middle and at the middle of each interspace, as well as in the next 

 to the lowest subcostal interspace, a series of large circular dark spots, of 

 nearly or quite half the width of the interspaces in which they fall, often, and 

 especially in the upper interspaces, enclosing a small black pupil; these spots 

 are almost exactly parallel to the outer border, that in the lowest median in- 

 terspace with its outer border at an interspace distance from it; with the excep- 

 tion of that in the lowest subcostal interspace, they are each surmounted interiorly 

 by a much smaller circular light spot, the centre of which is near the circumference 

 of the larger spot, so as to infringe upon it; with the exception of the upper- 

 most, which is nearly as large as the spot on whose summit it is placed, the 

 light spots are of nearly equal size and about one-third of an interspace in 

 diameter; or if anything the two lower, seated on the largest spots, are smaller 

 than the others; the wing must have been wrinkled between the nervules next 

 the outer border, as shown by the dark lines running from the border to the 

 centre of the dark spots. The outer edge and the apex of the inner are uniformly 



dusky and rather lighter than the other dark parts of the wing; the fringe is 



v 

 evidently lost. 



The hind wing is very dark at the base, like the fore wing, nearly as far as 

 the extreme tip of the cell ; this dark area merges gradually into a lighter portion, 

 which crosses the wing as a very broad equal band having its outer limit at a 

 narrow, dark, regular belt, with ill defined outline, which crosses the wing sub- 

 parallel to the general course of the outer border a little within the middle of 

 the outer half of the wing; within this broad light band are two narrow trans- 

 verse powdery streaks of dark scales, one extending from the extreme tip of 

 the cell, and broadening a little in its course, running in a curve opening inward 

 to the inner border; the other starting from the same point in an opposite direc- 

 tion, and passing in a sinuous course, with varying width, toward the middle of 

 the basal two-thirds of the upper subcostal nervule, hardly separate from the 

 outer limits of the dark base of the wing. The darkest part of the narrow band 

 in the middle of the outer half of the wing has a regular curve and strikes the 

 borders in the middle of their outer halves; there is a submarginal slender dark 



