Nov. 2] 
1901 WEEKS — BOLIVIAN BUTTERFLIES 87 
spot at end of discoidal space, and below it, under first median nervure, another 
larger one nearer the base. Below this, in next lower interspace and nearer 
the hind margin, is a whitish speck scarcely visible on the most pronounced 
types. The upper surface of hind wings is bronzy brown without markings. 
The under surface of both wings is grayish, especially the hind wing. The 
basal area of fore wing is dark brown without lustre. The costal region is 
sprinkled with gray-brown scales, more prominent toward apex, and extend- 
ing downward along hind margin, nearly disappearing at inner angle. The 
indistinct markings of upper surface are distinctly white and prominent and 
somewhat suffused. The small speck on lower submedian nervure of upper 
surface is suffused outward and inward, forming an extensive white dash, the 
most prominent feature of the under surface. The edge of inner margin is 
lightish brown. 
The under side of hind wing is dark brown, but so heavily dusted with 
light brown or grayish scales that the general appearance is grayish brown. 
One sixteenth inch within hind margin is a dark brown line running from 
upper angle toward anal angle, not prominent. Just within this is another 
similar line, more prominent than the outer one. Both of these stop at the 
submedian nervule. Midway from apex to base at costa are two wavy lines, 
one sixteenth inch apart, extending downward across end of discoidal space 
and then diverging as they approach submedian nervure. The inner marginal 
space is somewhat lighter than general ground color. 
While the markings of upper surface may vary in intensity, even to com- 
plete obliteration, the markings of under surface are less variable, and appar- 
ently are quite distinctive of this species. 
Taken near Coroico in May, 1899. 
Pamphila briquenydan sp. nov. 
Habitat: La Paz, Bolivia. Expanse: 1.12 inches. 
Head and legs dark brown above; whitish beneath, tinged slightly with 
dead brick red. Abdomen dark brown above; whitish beneath, heavily tinged 
with dead brick red. Antennae dark brown above; lighter beneath and 
tipped with black. 
Upper side of fore wing dark brown without lustre. Hind marginal fringe 
the same. The costa is dusted with light bronze from base midway to apex. 
In subcostal interspaces near apex are two white spots, one below the other. 
Near the end of discoidal space, and touching median vein, is a small white 
spot. In interspace outside of this is another somewhat larger spot. Below 
these, and between them, in next lower interspace, is a still larger white spot, 
