125 



lines, with yellow between, t lie mesial band being curyecl with two strong 

 angles below the median vein, the o ter two rounded and verv large, 

 much more prominent than in P. testata, shaded diffusely within. In the 

 middle of the baud is an angular, curved row of large, yellow, round spots; 

 the outer edge of the band is supplemented by a dusky ochreous, narrow 

 line. The submarginal row of tawny triangles lined with white, present, in 

 European examples, is usually wanting. The rest of the wing clear, with a 

 dark, oblique, apical patch, shading below into a dark ochreous hue. Base 

 of fringe with a dark line. Hind wings pale yellow, with a subterminal, 

 irregular, dark line, becoming obsolete toward the costa. Beneath, the discal 

 dots are conspicuous, and there is a straight, dark, narrow line on the outer 

 third of the wing, all that re-appears of the outer double band above. On 

 the hind wings is a faint, extradiscal, curved, dentate line. 



Length of body, 0.55; of fore wing, 0.75; expanse of wings, 1.30-1.40 

 inches. 



Labrador (Moeschler) ; Brunswick, Me. (Packard) ; Brooklyn, Mass. 

 (Shurtleff) Beverly, Mass. (Burgess); White Mountains, New Hampshire, 

 August (Sanborn, Bost. Soc. Nat. Hist.) ; Tuckerman's Ravine, Mount 

 Washington, New Hampshire, August 25 (Shurtleff, Bost, Soc. Nat. Hist.) ; 

 Mount Ascutney, Vermont (Sanborn, Bost. Soc. Nat. Hist.) ; near Berthoud's 

 Pass, Colorado, 12,000 to 13,000 feet elevation, August 16 (T. L. Mead) ; 

 Victoria, Vancouver Island. July (Crotch, Mus. Comp. Zool.). 



This pretty species is easily known by its large size, the dark-brown 

 double lines and bands, the dark apical patch, and the two large teeth on the 

 ouler side of the middle double band. 



On comparing several American examples with three from Germany, 

 received from Professor Zeller, I do not find any specific difference. Our 

 specimens mostly (except the Colorado individual) want the submarginal row 

 of triangular, tawny spots on the fore wings, which are very distinct in the 

 European examples; but, in one rubbed American specimen, there is an 

 approach to this in a series of obsolete spots. 



The distribution in the Old World, according to Staudingcr, is as fol- 

 lows : Central and Northern Europe; Ural and Altai Mountains; Amur. 



Larva. — "The caterpillar has the head rather small ; the second segment 

 also rather small ; the third segment is swollen, or furnished with a dorsal 

 band, raised transversely. In color, il is remarkably variable, being of one 



