123 



coslii lotlic 1111(1(111' ol' tlic inner edge, with a small Itxjtli poinliiiij inward just 

 above \hc intcniiil vein ; outer line iiiiiuiiig straight riniii the outer (iiiarlf^r of 

 the costa ill an ol)li(iue direclioii to the lirst median vein ; ^eulloped slightly in 

 the two succeeding interspaces; in the sul)mediaii interspace the liiu; is 

 straitrht, directed a little outward ; the re<rion between these two lines a little 

 darker ochreous than the rest of tin; wing, with I wo lliiut, parallel, median 

 hair-lines passing through it; bevoiid, and especialh' toward the apex, the 

 wing is lemon-yellow, frosted with white; the apical, obliriue streak white, 

 a little waved l)elow, under the line deep-oelireous ; fringe whitish. Hind 

 wings whitish, with a iiiiiit outer line; in the male, tinted faintly with pale- 

 brown along the outer edge of the wing ; lieneath uniformly whitish, with two 

 brown liair-linei5 common to both wings, I he inner ol)solete away from tlu; 

 costa, and a little scalloped on the hind wing; discal dots dark, distinct 

 beneath on both wings. 



Length of body, <?, O.GO, ?, 0.43; of fore wing, c?, 0.64, 9, 0.58; 

 expanse of wings, 1.20 inches. 



Newton, JIass. (Dr. Waters) ; Brookline, Mass., August 20 (ShurtlefT, Bost. 

 Soc. Nat. Hist.); New Jersey (H. Sachs); Easton, Pa. (Stulfz) ; Bailey's 

 Ranch, on South Park Road, twenty-five miles from the park, elevation 8,000 

 or 8,500 feet, Colorado Territory, August 29 (Mead) ; Victoria, Vancouver 

 Island July, (G. R. Crotch, Mus. Comp. ZooL). 



This species is characterized by the frosted appearance of the wings, 

 the lines being edged with white ; by the third line on fore wings being 

 regularly curved outward, and not pointed and scalloped. The outer line is 

 less scalloped below the first median venule than usual, and the triangular, 

 deep ochreous, apical spot is very distinct. It is identical with the Euro- 

 pean P. testata, as I find l)y comparing our specimen with two from Europe 

 received from Dr. Staudinger. The hind wings are apt to Ik* darker, more 

 yellowish, in American examples. 



Staudinger gives the following distribution: Central and Northern 

 Europe, excluding Halieia and (?) Hungary; Ural Mountains; Altai Mount- 

 ains; Amur. 



Xrtm/.— "The caterpillar, when full-grown, rests in a straight posture, 

 and does not fidl oil" its food-plant when disturbed; th(! head is flat and por- 

 rectcd; the body is cylindrical, without humps. The head is putty-colored, 

 with darker dots and reticulations; the body, also, is putty-colored ; the back 



