160 PliOCEEDINOS OF THE NATIONAL MUSEUM. 



when best marked, a little oblique from the costa, darkening the reni- 

 form and below it running rather close to and parallel with the trans- 

 verse i)osteri()r line. Transverse posterior line geminate, the inner line 

 smoky and rarely complete, the outer line black, irregular, more strongly 

 dentate on veins 3 and 4. As a whole it is somewhat S-shaped. There 

 is an outward tooth in the submedian interspace in most of the speci- 

 mens. Subterminal line interrupted, irregular, pale, marked by black 

 scales in the interspaces. There is a series of terminal spots, beyond 

 which the fringes are cut with black. There is a more or less evident 

 black streak, which is generally interrupted at the base, and below this 

 the basal si)ace is darkened by black powderings. A more or less 

 obvious smoky shading extends above vein one to the median line, 

 though the tendency in this species is to lose its shading. The inward 

 curve of the transverse jtosterior line above the anal angle is followed 

 by a dusky shading which usually extends only to the subterminal line, 

 but sometimes reaches the outer margin. As a whole the subterminal 

 space is somewhat smoky filled. The ordinary si>ot8 are distinct; the 

 orbicular small, round, black ringed, with a central dusky dot; the reni- 

 form large, kidney-shaped, somewhat incompletely outlined and with a 

 smoky center, yecondaries yellowish white in the male, more smoky 

 in the female. Beneath whitish, more or less powdery, in the female 

 with a distinctly smoky tinge. Discal spot obvious on the secondaries, 

 less distinct and sometimes wanting on the i^rimaries; rarely with a 

 traceable exterior line, except on the secondaries. 



Expanse, 1.20 to 1.50 inches (30 to 37 mm.). 



Habitat. — United States, west to the Kocky Mountains, Canada, 

 May to August; central New York, July and August; Minnesota in 

 June; central Illinois in July; New Jersey, July 17; Washington, 

 District of Columbia, in May; Glenwood Springs, Colorado, in August. 



The synonymy of this species as above given is, I believe, correct. 

 Except in the case of Mr. Grote's species I have not seen the type; 

 but Mr. l>utler has definitely referred imprcssa and fasciata as being 

 the same, while Mr. Grote has referred fasciata as the species identified 

 by him as hnonosa. The discussion concerning this species Avill be 

 found under the next heading. 



LARVA. 



LiNTNKi:, Twenty-sixth Hept. N. Y. State Mu8., 1874, p. 159 {ohlinita). — Coquil- 

 LKTT, Piipilio, 1881, 1, p. 56 (5r(fmo8«). —DiMMOCK, Psyche ,1885, IV, ]>. 274.— 

 Packako, Fifth Rept. II. S. Eut. Comm., 18'J0, p. 169. 



Stage VII. — Head shining black, without marks; width, 2.8 mm. 

 Body velvety black, a broad diffuse, faint reddish substigmatal stripe 

 (V and VI). Warts pale, sometimes whitish on the central segments, 

 hair short, in small bunches from the warts, dorsal si)ace appearing 

 black from the absence of hair. On joints 3 to 5 and 12-13 the hairs 

 are somewhat spiny and light reddish brown; elsewhere soft and pale 

 yellowish. A few long ones at the extremities; wart IV very small. 



