1864.] 113 



primaries is more rounded, and the whole wing is hardly so broad, and 

 the spots are larger, more numerous, and of a much deeper yellow. In 

 the hind wings the internal angle is more rounded, and the outer edge 

 is more convex ; the two black band.s narrower, and the discal reni- 

 form dot is farther removed from the inner band than in P. pai'thetios. 



Platarctia Scudderi n. sp. 



% . Brownish black. Sides of the prothorax orange. Two whitish 

 bands on the fore wing; one lying just under the base of the median 

 nervure, as long as the thorax ; the other transverse running from just 

 above the internal angle to the outer third of the costa. The middle 

 of the patagia is whitish, and there are two curved narrow lines on 

 each side of the meso-scutum. The tips of the palpi, and the ends of 

 the femora above, and the tibise and tarsi are very pale yellowish white, 

 concolorous with the bands on the thorax and primaries. 



Secondaries entirely brownish black and concolorous with the fore 

 wings. 



Length of body, .45 ; length of primaries, .65 inch. 



This species is intermediate in size between P. horealis and modesta, 

 and is easily distinguished by its simple markings, chiefly consisting of 

 a basal longitudinal and transverse sub-apical band. 



Collected by Mr. S. H. Scudder on the Saskatchewan River, Brit. 

 America. 



Platarctia modesta n. sp. 



% . Brown, head and thorax darker. Patagia with a pinkish white 

 stripe, preceeded by two dots on the prothorax and at the base of the 

 antennre, with a few concolorous scales on the vertex. Primaries with 

 a light costal spot, connected with the discal dot. A concolorous spot 

 on the internal angle. A large spot at the base of the m. nervure. 



Secondaries mostly darker, with a broad light pinkish mesial band. 

 Outer margin interrupted by eight spots. Beneath, the primaries are 

 pinkish-yellow at their base, with a dark median band ; beyond paler, 

 while the outer margin is dark. Base of the .secondaries pale, other- 

 wise as above. Legs dark. 



Length, % .45. Exp. wings, 1.20 inches. 



California. (Mus. Comp. Zobl. A. Agassiz.) 



