THANATITES VETULA. 63 



apex of the fore wing as in that genus. As to the markings, the agreement with 

 Thanaos is less striking, although the pattern resembles that of Thanaos more 

 closely than it does that of any other genus. In the fore wings the spot in the 

 cell of Thanaos is wanting in the fossil, but in its stead there is a costal spot at 

 the extremity of the costal fold ; the subapical spots of Thanaos depending from 

 the costa are distinctly repeated in Thanatites, and in addition there is a submar- 

 ginal series of small round spots of which the upper two, in the uppermost in- 

 terspaces opening on the outer border, are the only ones visible on the fossil 

 by its mode of preservation. On the under surface of the hind wings of Thana- 

 tites, there is a regular submarginal series of equal, rather small, round spots, one 

 in each interspace, placed between the location of the marginal and submarginal 

 spots which occur in Thanaos, often distinctly, occasionally as faint blurred bands, 

 as in T. Juvenalis (PI. Ill, fig. 11) ; the inner of these two series in Thanaos, 

 which corresponds best to the submarginal series of Thanatites, is irregular instead 

 of parallel to the border, being always bent inward opposite the cell. Instead of 

 the spot, placed in the costo-subcostal interspace of Thanaos near the middle of the 

 wing, and seen distinctly in T. Juvenalis, there are two spots, which, with a third 

 near the base of the wing above the costal nervure, are placed at equal distances 

 apart and from the costal border; in addition there are two spots, seldom even 

 indicated in Thanaos, near the centre of the wing, the larger of which is near the 

 apex of the cell. These differences alone would suffice to show that the fossil can- 

 not be referred to Thanaos, and; with the other indications we have given, compel 

 us to place it apart, but in the immediate vicinity of this group of Urbicola?. 



THANATITES VETULA (HEYDEN) SCUDDEK. 

 Plate m, figs. 12, 16. 



Vanessa vetitla HEYD., Palseontographica, viii, 12-13, Tnf. i, fig. 10 (1859). 

 Araschnia vetula KIRB., Syn. Cat. Diurn. Lep. 179 (1871). 



The only notice of this insect that has been published is the original figure 

 and description of von Heyden. The figure is reproduced in our PL III, fig. 16. 

 The description is as follows : 1 



1 Palxontogr. viii, 12-13. 



