18 



side of the dorsal stripe, except on the third segment, which is 

 entirely dark tawny brown. Underside white, striped with tawny 

 brown. Fore legs white, with longitudinal brown lines on the 

 femora and tibise ; middle and hind femora white, striped with 

 tawny ; middle tibise tawny on the outside, also a tuft of scales 

 on the middle and at the end tawny ; hind tarsi tawny at the mid- 

 dle and end, and all the tarsi are marked more or less with this 

 color at the end of the segments. 



Fore wings fissured nearly to the middle, tawny yellow, with 

 two oblique white stripes crossing the lobes, dividing them into 

 nearly equal parts, the space between these stripes often rusty 

 brown, a transverse white spot just within the end of the fissure 

 is edged on its inner side with rusty brown, the posterior end often 

 extending outward and fusing with the first cross line. There is 

 usually a very oblique white spot on the cell near the middle of 

 the wing, with a dark dot at the basal end of it, and a second 

 white spot rests on the hind margin at the basal fourth of the 

 wing. The fringes of the two lobes are whitish, cut by blackish 

 at the apex and anal angle, this latter on the second lobe extend- 

 ing along nearly half the hind border. Hind wings rusty brown, 

 the third feather white in the middle and dark brown at the end, 

 with large dark scales in the fringes on both sides of this part of 

 the feather. 



Thirty-five specimens examined. 



Habitat. Maine to Missouri, Ontario, Quebec, Texas. Food, 

 leaves of the grape vine. 



Larva. Length, about 12 mm. Head yellow, with the mouth 

 parts brown. Body pale greenish yellow, deeply constricted 

 between the segments. Each segment has a transverse row of ten 

 moderately sized tubercles, from each of which arises a cluster of 

 from six to twelve long, whitish, diverging hairs, besides which, 

 scattered over the surface, are short hairs which are enlarged at 

 the tip. Legs yellow, long and slender. 



Pupa. Length, 11 mm. Diameter, 2 mm. Front obliquely 

 truncated, with two irregular ridges extending up over the truncate 

 part and along the dorsum on either side of the median line, 

 diverging towards the metathorax, where they terminate in a pair 

 of flattened, sharp-pointed projections, about as high as two-thirds 

 of the diameter of the pupa. The ridges are higher, and toothed 

 on the top of each segment. On the first five abdominal segments 

 there is a row of short spines on each side, in line with the 

 abdominal projections. These spines incline forward, and on the 



