THE LEPIDOPTEROUS GENUS PAMPHILA. 347 



as seen from the side, the apical half compressed, laminate ; lateral arms similarly com- 

 pressed, but tapering only at the tip, longer than the hook, widely separated from it at 

 their base, curving upward. Clasjis nearly twice as long as broad, not extending nearly 

 so far backward as the upper organ, the upper edge broadly angled near the base, its 

 apical half a little incurved, the sharply pointed apical denticle a little incurved, and sep- 

 arated widely l^y a deep rounded excision from a much larger, but equally pointed, up- 

 turned and slightly recurved tooth at the extremity of the upper margin of the clasp ; 

 the recurved edge of the lower mai'gin forms a uniformly serrated lamina supporting the 

 inner anterior edge of the apical tooth, and terminates anteriorly in a pointed upturned 

 tooth opposite, and similar to, the preapical tooth of the upper edge of the clasp. 



Excepting P. 3Iaiutoha, which has once been found on the lower St. Lawrence, it is the 

 only eastern species in America, but it extends as far west as Iowa (Allen) and Nebraska 

 (Dodge), and is common, according to Abbot, in Georgia. It is abundant in the south- 

 ern half of New England, and has been taken as far north as Norway, Me., (Smith). 

 I do not know of its occurrence in Canada. 



* 



2. Pamphila Nevada nov. sp. 

 Pl. X, d Figs. 1, 4, ? Figs. 2, 3. Pl. xi, Figs. 3, 4, 4a. 



Judging from the specimens which have fallen into my hands, this is the most abundant 

 species in the west, and it is one of the most widely spread, having been taken in Colorado, 

 California, Nevada and Oregon. Specimens from the latter region are a little paler upon the 

 under surface than those fronr more southern localities, and the same is true of the upper 

 surface of the females. The species is of the size of P. comma, and the males differ from 

 tho-se of P. comma, and of all the other species of the genus (excepting the larger P. Ottoe), 

 in the clearness of the upper sin-flice of the wings ; occasionally the wings are somewhat 

 suffused with dusky, but usually the hind wings have but a narrow edging of blackish, 

 broadened, naturally, along the costal border ; and the fore wings, mstead of having a dis- 

 tinctly limited bordering, as is common to a greater or less extent in most species, have the 

 wing gradually more and more suffused with a warm but dusky tint toward the tip, as is 

 not unfrequently the case in P. comma ; sometimes the mesial belt of the under surface 

 is visible above, but occasionally, at least, it is wholly absent. The female scarcely differs, 

 upon the upper surface, from the females of P. Manitoba and P. comma, except in almost 

 uniformly having the small suljaplcal spots, both those near the costal, and those near the 

 outer border, j^aler than the others, or nearly white, as occasionally happens in the female 

 of P. comma. Beneath, the mesial white band of the hind wings is more irregular and scat- 

 tered than in P. comma or P. Man'itoha ; in the male it is usually broken up into four ■ 

 separate patches, connected, by their angles only, into a continuous angular belt ; three of 

 these patches, of nearly equal size, but the middle one usually the largest, lie in a straiglit 

 line parallel to the longer axis of the wing, situated one each in the subcostal and subcosto- 

 median interspaces ; the last patch, not much larger than the second, is composed of three 

 confluent spots in the median and medio-submedian interspaces, as far from the outer Ijorder 

 as the second patch, the medio-submedian spot farther removed from the border than the 

 rest ; the ground color of the wing is a greenish griseous, and the spots are narrowly edged 

 exteriorly and interiorly with blackish. The markings .of the female are similar, excepting 



