TRIFIDA^.. 49 



fore wings more distinct, and slight and variable differences 

 in the central ornamentation ; but it is in all probability the 

 present species. It is widely distributed in the eastern, 

 northern, and middle United States, and in Canada. 



6. N. flammatra, Fah. — Expanse If to If inch. Collar 

 black ; fore wings long, pale ashy-brown, costa whiter to the 

 middle ; a slender black streak from the middle of the base 

 is followed by another extending to the pale orbicular stigma ; 

 costa spotted with black ; hind wings brownish-white. 



Antennre of the male simple, but ciliated with rather long 

 scanty bristles, light brown ; palpi short, densely tufted, 

 black-brown at the sides, drab in front ; head tufted, especi- 

 ally so between the antennte, drab dusted with light brown ; 

 collar raised, whitish-drab at the base, with a broad dark 

 chocolate triangle occupying the upper portion ; remainder 

 of thorax drab dusted with brown, crested at the top and 

 slightly so at the back ; shoulder-lappets long ; fascicles long, 

 brownish-white ; abdomen long, smooth, pale brown or drab ; 

 lateral tufts very small, anal tuft narrow, glossy pale brown. 

 Fore wings long, narrow at the base ; costa very faintly 

 rounded ; apex bluntly augulated ; hind margin oblique, 

 gently curved below the middle; dorsal margin straight to 

 near the base, then curved in ; colour pale brown or ashy- 

 brown, with a broad, paler brown or whitish stripe occupy- 

 ing the subcostal region to the middle, at least ; commence- 

 ment of all the lines indicated by blackish spots on the 

 extreme edge of the costa ; basal line only so indicated ; first 

 line abbreviated, obscure, faintly blackish and double, the 

 enclosed space rather paler than the ground colour ; second 

 line equally obscure, double, brownish, and enclosing a series 

 of pale crescents, the tips of which are dotted with black ; 

 subterminal line faintly paler, edged inwardly sometimes by 

 obscure wedge-shaped dots or by a faint brownish cloud, and 

 outwardly by a faintly darker shade of the ground colour ; 

 from the middle of the base an undulating black streak almost 



VOL. IV. D 



