240 PROCEEDINGS OF THE NATIONAL MUSEUM. tol. 57. 



numerous, about 30 from the hyaline spot to the very obtuse anal 

 angle, and of these very few are branched. Discal region with a 

 pair of round dark spots, nearly 3 mm. apart, the lovrer more broad. 

 A third dark spot where the radius breaks up into small veins, about 

 1.5 mm. from the costo-apical margin. 



Green River shales back of house at Smith's Ranch, in the vicinity 

 of Cathedral Blufl's, Colorado (Winchester 17.3, U.S.G.S.). 



Holoty 2)e.—C&t. No. 66554, U.S.N.M. 



This is much larger than H. reticulata Scudder, and differs in that 

 the subcosta does not bend upward to the costal margin, but runs 

 along parallel with it, in the manner of the living genus Scolypofa 

 Stal. Indeed it is not evident that the insect is to be separated from 

 Scolypopa; but as this genus is not a member of the present North 

 American fauna and Hamma'pteryx was based on a very similar 

 insect from the Green River shales of Wyommg, I provisionally 

 place the new species in Scudder's genus. There is also a general 

 resemblance to the living genus Phrornnia Stal. 



The specific name is given because the tegmina look like fish scales. 

 The two inner dark spots evidently correspond with those of Hilav- 

 rita trimaculata Distant, from Ceylon, but the}" are rather more 

 basad in the living species. 



HAMMAPTERYX (?) CERYNIIFORMIS, new species. 



Plate 32, fig. 8. 



Anterior wings or tegmina about 12.5 mm. long and 8 broad; 

 closeh^ related to H. Jepidoides, and evidently congeneric v.'ith it, 

 but the markings are different. The spot near the end of the radial 

 field is large and has on its inner side a semicircular hyaline spot, the 

 whole effect being that of an asymmetrical ocellus; about 2 mm. 

 below this spot is a vertical slender dark streak about 2 mm. long; 

 7 mm. from the apex of the tegmen is a very conspicuous but narrow 

 transverse dark fuscous band, terminating above just below the 

 subcosta. 



T'?/2^e,— U.S.G.S. ; Winchester's 17.3, Green River shales back of 

 house at Smith's Ranch, near Cathedral Bluffs, Colorado, Aug. 7, 

 1917. Collected by D. E. Whichester and H. R. Bennett. 



Holotype.— Cat. No. 66555, U.S.N.M. 



This insect is surprisingly similar to the living oriental Cerynia 

 maria (White), even to the black stripes on the tegmina, though these 

 are not arranged in the same manner. About 16 mm. from the teg- 

 men is a hind wing vvhich appears to belong to the same msect. It 

 differs from that of Cerynia hi having a large closed discal cell such 

 as Distant figures for Atracis emersoniana (Walker) or Gaja incon- 

 spicua (Kirby); as m the Gaja, the apical middle of the cell emits 

 a vein, but the apical face is angular instead of truncate. This hind 

 wing is on the piece of rock containing the reverse of the type. 



