68 ILLUSTRATIONS OF UNFIGURED LEPIDOPTERA. 



running across the wing from centre of costa to centre of inner margin, bordered 

 on its outer edge by a soft dark line. The area outside of this to hind margin 

 is of the ground color, the interspaces having indistinct spots or dashes of 

 lighter color. The basal area is of the ground color. 



The most distinct markings of entire upper surface are the white dots. The 

 rest of the surface is of ground color, suffusing into lighter shades in places, as 

 above described. The markings are so indistinct and so ill defined that they 

 hardly deserve to be called bands or spots. 



Under side of fore wing is practically the same as upper side, except that the 

 coloring is a shade lighter and the inner marginal area tends to grayish. 



The basal area of hind wing, beneath, covering one-third of the wing area, is 

 dark brown. The rest of the wing, to hind margin, is brown of a lighter shade, 

 crossed at its centre by a dark line running from a point near upper angle to 

 just below the centre of inner margin. In the three lower interspaces this line 

 bears dashes of white scales. Inner marginal area heavily dusted with light 

 gray scales. 



Taken five days travel north from Cochabamba in September, 1899. 



Cosmosatyrus nilesi A. G. Weeks, Jr. 1 



(Plate XXV, Figures i and 2.) 

 Habitat: Sicasica, Bolivia. Expanse: i. 60 inches. 



Male. Head, palpi and thorax dark brown above and below. Antennae and 

 legs, above, dark brown ; below, light brown. Abdomen, above, dark brown ; 

 below, very light brown. 



The upper surface of both wings is dark brown suffusing to very light 

 brown or bronze in outer half of wings. The entire surface has a golden 

 lustre. 



Fringe at hind margin of fore wing is dark brown. Hind margin is edged 

 with a dark thread. The space within the hind margin for a quarter 

 of an inch is somewhat darker than the area next within it, and is bordered 

 on its inner side by a dark jagged line running from the subcostal nervule 

 down to the lower submedian nervule. This line is very indistinct in 

 some specimens, quite imperceptible in others. Within this line is an area 

 of very light brown or bronze covering apical area and extending downward 

 to inner margin ; it suffuses into the dark brown of basal area as it reaches 

 discoidal space. In some specimens the basal side of this light area is 

 bordered by a very distinct line of very dark brown, starting near costa 



* Entomological News, Vol. XIII, No. 4, p. 105, April, 1902. 



