10 Grote and Robinson's Lepidopterohgical 



distiuct, and slightly irregular and arcuate. There are no paler mar- 

 ginal shades to any of the lines. Apical streak prominent. Fringes 

 dark brown. 



Posterior wings entire, dark brown, of the same general shade with 

 the anterior wings, gradually shading to paler to the base. A linear 

 median paler central shade, denned inwardly with darker scales. 



Under surface dark brown. The anterior wings darkest, the colora- 

 tion becoming more intense towards the internal margin on both 

 pairs. 



The scales which clothe the head, and those which form the dark 

 thoracic patch, which is characteristic of the genus, are of an intense 

 dark purplish-brown color, narrowly deepening to blackish at the edges. 



Meta-thoracic and lateral scales concolorous with anterior winss 

 at base. 



Abdomen above, pale brownish, with a slight testaceous tinge 

 deepening in color to anal segments ; beneath, darker. 



Antennoe brownish, paler on their inner surface. 



Legs pale brownish ; anterior tarsi and femora clothed with darker 

 scales on their upper surface. 



Exp. % and 9 1.80 to 2.20 inches. Length of body, 0.85 inch. 



Habitat. — West Farms, N. Y., (J. Angus.) Long Island, (F. & J. 

 Tepper.) Seekonk, R. I., (Mrs. S. W. Bridgham.) West Virginia, 

 (Edwards.) 



Mature larva. — Head black, shining. Body smooth, purplish- 

 black, clothed with long whitish hair, arranged more densely on the 

 segments latterly, sparse and irregular dorsally. Four pale yellow 

 lines on each side, the lower obsolete centrally above the abdominal 

 legs. The dorsal, swelled portion of the prothoracic ring is black 

 behind, but yellowish immediately adjoining the head. A longitudinal, 

 ventral, yellowish line. Beneath, the segments bearing thoracic legs 

 are purplish-black, concolorous with their upper surface. Abdominal 

 legs flesh-color ; thoracic legs blackish. Feeds on species of Walnut, 

 (Juglandis.) Enters the ground towards end of August and begin- 

 ning of September. (Auth. Angus). 



We have examined numerous male and female specimens of this 

 species, which is readily distinguished from all others of the genus by 

 its peculiar smoky brown coloration. We have named it after Mr. 

 James Angus, whose valuable material has been of service to us in 

 limiting the species of this genus. 



Coll. Ent. Soc, Philadelphia. 



