no. i. BOMBYCINE MOTHS OF NORTH AMERICA— PACKARD. 221 



Fore wings at base rather bright reddish madder extending to the broad white distinct 

 basal band which may, as in S. cecropia, be either angulated on the median vein or regularly 

 curved; it is narrowly shaded with black externally. Extradiscal band white, the edges dark, 

 with no reddish externally as in S. cecropia. It is slightly cxcurved opposite the discal spot, 

 and is slightly scalloped, varying in the degree of curvature and in the distinctness and complete- 

 ness of the scallops. The median area between the two bands is dark purple madder but not so 

 rich and clear a madder tint as at the base of the wing. Beyond the extradiscal band the wing 

 is densely powdered with black. The row of five black submarginal patches behind the ocellus 

 as in S. cecropia, there being three of them, one in median cells, 1, 2, 3, respectively, which are 

 larger and more distinct than the others. The black, sinuous submarginal line situated as in 

 S. cecropia, but quite different in the scallops being arranged in pairs, each half separated by 

 the end of a vein; there are four of these double scallops. The line extends toward the apex 

 and costa connecting with the costo-apical black spot, which is narrower, linear, not broad, 

 triangular and diffuse as in S. cecropia. The costo-apical white line is as in S. cecropia, being 

 composed of two scallops varying somewhat in distinctness. 



The discal spot in the fore wing is narrow, oblique, not so parallel with the costa as in 

 S. cecropia, but with the extradiscal line in six examples; it is white, usually edged with reddish, 

 and the reddish shade is bordered externally with black, but in one out of six examples the 

 red is wanting in both pairs of wings. The discal spots vary much in shape, from an oval 

 (5.10 by 4 mm.) to an elongated kidney shape, and to a long narrow mark measuring 6 by 2 mm. 



In the hind wings the discal spot is of the usual comma shape, the apex or outer end not 

 extending so near the extradiscal line as in S. cecropia. It varies from being broad short ovate 

 (6.10 by 5 mm.) to an elongated and narrow spot (7 by 3 mm.) or larger (11 by 7 mm.). 



The subapical ocellus is regularly rounded oval at each end; it is black, the contained pale 

 blue semicircular line varying in being a half circle, or tending to reduction in one <? . Its 

 hollow is partially filled with pale vandyke-brown scales, which in some examples are rarely 

 wanting (in one S there are only five or six of these brown scales) . Between this ocellus and 

 the costal edge is a gray bluish patch or discoloration growing whiter toward the zigzag white 

 line. (This whitish patch is much less distinct and smaller than in S. cecropia, while it is wanting 

 in S. gloverii and californica.) 



In the hind wings the marginal markings of the outer edge are much as in S. cecropia; 

 there is however no red shade beyond the extradiscal line, tins area being black-brown. The 

 submarginal series of seven spots are as in S. cecropia, but much darker, the line beyond is 

 narrow and definite, rather more distinctly scalloped than in S. cecropia, and the edge and 

 fringe are darker, vandyke-brown, than in S. cecropia. 



Under side of wings darker than above, grizzly black-brown, with no shades of madder, 

 and the markings are more distinct and whiter, contrasting with the rest of the wing. In the 

 subapical region of the fore wings there is less red than in S. cecropia. 



The extradiscal lines on the under side are white edged within with black; the discal spots 

 are broadly edged with black, and with reddish ochreous within. Legs dark madder-purple. 



Expanse of wings (bred specimens), 3 83-95 mm.; length of fore wing, S 43-52 mm. 

 Expanse of wings (bred specimens), $ 93 mm.; length of fore wing, ? 48 mm. 



The variation of the discal spots in this species is especially noticeable, their shape and 

 size not being so constant as in S. cecropia. The subapical ocellus is rounder, more as in S. gloveri 

 than in S. cecropia; on the under side the blue semicircle tends to become irregular and sinuous. 

 That this eye-spot is only a modification of one of the intracellular series behind is well seen in 

 this species, where these spots are quite closely developed. 



Dr. James Fletcher informs me that the Manitoba form "is much redder than our eastern 

 form," referring to those occurring in Ontario. 



Judging by the imago and its geographical distribution this is a melanotic offshoot of 

 S. gloveri which has, since the glacial epoch or since the climate of the region it inhabits has 

 become what it is, been transformed into a fixed species. It is an inhabitant of a cooler and 



