12 PROCEEDINGS OF THE NATIONAL MUSEUM vol.81 



Barnes and McDunnough, and Kermode are strikingly similar and 

 most of those that I liave seen resemble them closely, the series from 

 the Koyukuk River and those in Lord Rothschild's collection from 

 the Ramparts about 75 miles to the southward (pis. 5-8) are so very 

 variable that scarcely any two are alike. 



The fore toivg varies greatly in shape. The outer border may be 

 nearly at right angles to the lower border, as in the specimen figured 

 (pi. 7, fig. 3) , or it may make as large an angle wdth the lower border 

 (pi. 7, fig. 6) as in the Chinese specimen figured (pi. 1) or in P. m. 

 hudsoniamis (pi. 3). The outer border may be straight (pi. 7, fig. 

 6), as in the specimen figured (pi. 2), or slightly, or even rather 

 strongly (pi. 7, fig. 5) convex, the submarginal spots in the last case 

 lying in a broad curve; it may be evenly curved (pi. 7, fig. 1), or 

 straight in the anterior half and curving broadly inw^ard in the 

 posterior half (pi. 7, fig. 3) so that the lower angle of the wing is 

 very broadly rounded. The apex is commonly more broadly rounded 

 than in the specimen figured (pi. 2), though it may be more acute 

 (pi. 5, fig. 5). 



The dusting of light scales over the dark base of the fore wing is 

 usually about the same as in the specimen figured, but is often less 

 heavy, and the black outer margin of the dark base is usually broader 

 within the cell, and often also beneath the cell (pi. 5, fig. 4). The 

 submarginal yellow spots vary greatly in size, in some being larger 

 (pi. 7, fig. 5) and in others smaller (pi. 5, fig. 3) than in the specimen 

 figured. The black border is usually broader posteriorly than an- 

 teriorly, but in one specimen (])1. 7, fig. 5) its inner edge is parallel 

 with the outer edge of the wing. It is usually about as in the speci- 

 men figured (pi. 2), but it may be broader (pi. 5, fig. 2; pi. 7, fig. 2), 

 though not so broad as in the Chinese specimen shown (pi. 1.). The 

 band across the middle of the outer half of the cell is often less regu- 

 lar (pi. 7, figs. 1, 4, 5) than in the specimens figured (pi. 2). It may 

 be wedge-shaped with the lower end less than half as broad as the 

 costal end or even narrower (pi. 7, fig. 1) ; the distal (adapical) 

 border is commonly rathe? broadly excavated at about the middle 

 (pi. 5, fig. 1), wdiile there may be a smaller and more angular inden- 

 tation on the proximal border near the lower end (pi. 7, figs. 3, 4). 

 If both of these indentations are developed (pi. 7, fig. 5) the lower 

 half of the band becomes chevron-shaped with the angle directed 

 apically and the lower end very narrow. 



On the under side the fore wing is in all cases essentially as in 

 the specimen figured (pi. 2, fig. 2) ; the marginal light band is some- 

 times narrower (pi. 6, fig. 3), or even slightly broader (pi. 8, fig. 5), 

 and the dark band just within it varies considerably in relative width 

 (compare figs. 2 and 6, pi. 8). 



