1874.] 155 [Morrison. 



entire median space blackish gray. The basal space is unmarked, 

 except by a black costal border. On the blackish median space are 

 scattered metallic scales, more frequent in the neighborhood of the 

 ordinary spots. These last are of the usual shape, but are formed of 

 raised patches of black scales. The median lines are black, the in- 

 terior oblique, the exterior outwardly curved around the reniform, 

 drawn in below the cell and prominently produced on the submedian 

 nervure. The terminal and subterminal spaces are white. The sub- 

 terminal line is broad, gray, and lobate. The fringe and terminal 

 line are also gray, but even ; the latter is composed of united spots. 

 The posterior wings are whitish, with a broad, much diffused gray 

 terminal border and discal dot. Beneath, the anterior wings are 

 black, white at the base ; the posterior wings white, with discal dot. 



Hab. Massachusetts. 



The markings of this little species are very well denned, the 

 black reniform and orbicular spots, overspread with bluish metallic 

 scales, are very characteristic. 



PTEROSCIA nov. genus. 



Eyes naked. Antennae of male with short, dense, hairy clothing; 

 of female, filiform, with a single lateral row of fine, separated hairs. 

 Palpi erect, reaching slightly above the eyes, the third joint of usual 

 length, the other two clothed with rather long, coarse hair. Front 

 rounded, un tufted, clothed with coarse, unevenly spread hair. Tho- 

 rax rounded, without an angular projection in the sides, and with a 

 very low fore and hind tuft (in one of my specimens this is scarcely 

 perceptible). Abdomen conical, untufted, just reaching the exterior 

 margin of the hind wings. Both wings with even margins, and broad 

 in proportion to their length. The fourth median veinlet of the pos- 

 terior (vein five of the German entomologists) not so strong as the 

 rest, and arising some distance from them. The tibiae are armed 

 with the usual spurs, and strongly spined, particularly the middle and 

 posterior pairs. All the femora with hairy tufts on their under side. 



In this genus the imagines are of medium size, with the body 

 rather slight in proportion to the spread of the wings, and with the 

 habitus of the Ophiusidce. The coloration is dull, and the markings 

 are obscured. It is allied to the European Eccrita Lederer, and 

 Toxocampa Guen.; from the former it differs by the spined anterior 

 tibiae, the hairy femora, and the broad anterior wings; and from the 

 latter by its spinose tibiae. 



