24 Grote and Robinson's LepiJoptcrofogical 



internal margin, clothed with long dust-colored hair, much as in allied 

 species. 



Under surface resembling that of C. neogama, sufficiently as to ob- 

 viate any but a comparative description. The median band on the 

 secondaries is quite similar, slightly broader and less constricted. Head 

 and thorax above, brown ; tetrulae with narrow marginal black lines : 

 prothoracic pieces with faint darker lines. Abdomen dust-colored, 

 tufted on the basal segments. 



Exp. 9 ,3.00 inches. Length of body, 1.80 inch. 



Habitat. — Illinois, New York, Pennsylvania. Coll. Ent. Soc. Phila. 



Several specimens examined. Resembles the description of 0. nebu- 

 losa Edwds., but differs in several important particulars, the color of 

 the ordinary spots, conformation of the median band on the under 

 surface of the secondaries and the general aspect of these on the upper 

 surface seem to be different, while some of the minor details, such as 

 the color of the scales clothing the nervules, etc. will not apply pro- 

 perly to 0. ponderosa, nobis. 



Catocala fratereula, n. s. (Plate 4, fig. 3, % .) 



Anterior wings rough, not silky, pale grey, shaded with greenish 

 scales basally and 'with oblique blackish shades terminally. Rasal 

 half-line, black, narrow. Basal and sub-basal spaces covered with oliva- 

 ceous green scales. Transverse anterior line irregular, black, distinct 

 at costa, below which the line becomes faint and sub-obsolete. Median 

 space pale grey anteriorly. A central costal black oblique shade con- 

 necting with the reniform spot. Posteriorly the median space is 

 darker, shaded with greenish or yellowish scales. Reniform spot faint, 

 large, with a brownish center, surrounded with a black annulus. Sub- 

 reniform spot obsolete. Transverse posterior line black, distinct su- 

 periorly, inferiorly becoming pale and indistinct; without prominent 

 teeth, where these are normally situate are two blunt, improminent 

 nearly equal dentations, below them the t. p. line is slightly irregular 

 undulate or sub-dentate without prominent inflections. Terminally, 

 the wing is obscurely shaded with blackish and slightly greenish scales. 

 An oblique sub-apical blackish shade. Sub-terminal line pale grey, 

 sub-dentate. A terminal series of dark interspaceal linear spots. 



Posterior wings dark yellow. A narrow median black band, the con- 

 formation of which is quite distinctive in the male. It is broadest 

 superiorly, slightly dilated centrally, beyond which it becomes narrow 

 and is acutely projected outwardly at a point above the dislocation of 

 the terminal band. Beyond this projection it runs back to just be- 



