124 ANNALS NEW YORK ACADEMY OF SCIENCES 



smoky; primaries darker, with the costal dots of upper side intensified and a larger 

 one at inception of t.p. line; secondaries paler, with a large discal spot. 

 Expands .58 -.64 in. = 14.5-16 mm. 



Habitat: New Brighton, Pa., July 11-31. 



Eight examples, in good to fair condition, all males; from Mr. H. D. 

 Merrick. As in pundicosta, the antennae have the joints distinctly marked 

 and feebly serrate, with obvious ciliae but no distinct tufts. There is also a 

 small scale-tuft at the base of the abdomen, which is rubbed in most speci- 

 mens. There is little or no variation except such as is due to the condition 

 of the specimens, producing more or less contrast between the median and 

 the outwardly adjoining areas. 



Erastria immuna nov. sp. 



Deep purplish brown or blackish over a pale base, the maculation black. Where- 

 ever the purplish overlay has been marred, the whitish base becomes more or less 

 evident. Primaries with basal line black, ob\'ious on costa, and emphasized by 

 whitish scales outwardly. T.a. line black, single, velvety, a little outcurved in the 

 interspaces, and on the whole a little inwardly obUque. Median shade black, 

 nearly upright, a little diffuse, and beyond it the wing tends to a little mottling. 

 T.p. line black, single, more or less lunulate, irregularly outcurved over the cell and 

 inwardly bent below it, emphasized by a few pale scales. S.t. Une irregular, broken, 

 pale, chiefly marked by a black preceding shade which is sharply defined on the line, 

 but becomes diffuse inwardly. A series of black terminal lunules which may be 

 emphasized by pale scales. A series of four white costal dots before apex. Fringes 

 cut with pale opposite the cell. Orbicular wanting in the specimens. Reniform a 

 creamy white lunule. Secondaries even, smoky gray. Abdomen smoky gray with 

 a conspicuous black basal tuft on dorsum. Beneath, gray, powdery; primaries 

 darker, with a paler terminal space; secondaries more whitish, with a small discal 

 spot and a tendency to an exterior line. 



Expands .80 in. = 20 mm. 



Habitat: New Brighton, Pa., July 21, 28. 



Two males, in fair condition; from Mr. H. D. Merrick. The species 

 is similar to muscosula in size and wing-form, but is much darker throughout, 

 and darker than any of the other species known to me. Of the two examples 

 before me, the one taken July 21 is almost uniformly purplish black with 

 the pale reniform and the small whitish costal dots conspicuous; the speci- 

 men taken on the 28th has the outer half of the wing distinctly pale-flecked, 

 and this seems to be due to the removal of some of the surface scales. The 

 species is therefore apt to be apparently variable, the more so as the black 

 markings are composed of somewhat elevated scales. 



