white; the base of the fore wings dark, hound beyond by a white line, which 

 is succeeded by a broader dark l)und; between this and the median dark 

 band is a wlrtte band varying in width; this band traversed by a dusky line ; 

 the median band and its discal dot is much as in lacustrafa, but there is apt 

 to be a decided sinus above the point on the median band ; beyond this band 

 is a broad, clear, white band, very well marked, and common to both wings; 

 it is this clear, cons|)icuous l)and which separates tins sjiecies from lacusfrata ; 

 this band contains a dusky line ; the margin of the wing is dark, traversed by 

 the usual scalloped line. Hind.wings dusky on the basal lialf, with a distinct 

 discal dot ; the I:)road white band is situated half-way between tlie discal dot 

 and the edge of the wing, whicli is dusky, and traversed by a wavy white line. 

 Length of body, <?,0.40, 9,0.;^6; of fore wing, S, 0.50, 9, 0.50; expanse 

 of wings, 1.05 inches. 



Springfield, Mass., June VI (^Dimmock) ; Cambridge, Mass. (Harris 

 Coll.) ; Brewster's, N. Y. (Grote) ; Ithaca, N. Y. (Smith) ; Washington, D. 

 C. (Dodge); Victoria, Vancouver Island. July (Crotch); l^ear Creek, June 

 21) (Lieutenant Carpenter, Hayden's Survey). 



There is uo difference between eastern and Pacific-coast examples, nor 

 can I see any difference in size or markiniis from European examples received 

 from Professor Zeller. 



The range of this species in the Old World is, according to Staudinger, 

 as t()llows: Northern Germany; Northern England (including Scotland); 

 Belgium; ? Southern France; (Switzerland; Galicia : Finland; St. Peters- 

 l)urg; Southern and Western Russia: Amur. 



Larva. — "The caterpillar is stout, rather attenuated at l)otii ends, and 

 rests with the head tucked in, the anterior part of the l)ody, when disturbed, 

 being curled in, or curved in tlu^ manner of the Ionic volute ; the head is 

 brown, beautifully dotted and marked with lilnck; the l)ody is smoky-brown, 

 delicately motlled and varied; the back may be said to have seven smoke- 

 colored stripes, alternating with paler stri])es; the medio-dorsal stripe is not 

 perceptible on either the second or thirteenth segments, l)ut is distinct and 

 uninterrupted on the third, fourth, tiflh, sixth, seventh, and eighth segments; 

 it is suddenly dilated anteriorly, and more gradually posteriorly, and is 

 extrenudy attenuated and scarcely perceptil)le on the remaining segments; 

 on each of tlu; interstices between the segments, commencing between the 

 fourth and liflli, is a short, transv(>rsc, r('(hlisli l)an(l, terminated at each 



