5O ILLUSTRATIONS OF UNFIGURED LEPIDOPTERA. 



nervule, is a delicate tail, black with a white tip, about one-eighth inch long, 

 and from the nervule next above, another, one-sixteenth inch long, with a 

 white tip. At anal angle is a small dot of rust color. The hind margin is 

 edged with a fine black thread. Both hind margins bear a slight fringe of 

 gray-brown hairs. 



The ground color of under side is a dead grayish brown. 



One-sixteenth inch within hind margin of fore wing, is an indistinct whitish 

 line running downward from about the third subcostal nervule to the inner 

 margin, bordered on the outside by an indistinct line of dark grayish brown. 

 Another and prominent white line runs from costa (at a point one-third dis- 

 tance from apex to base) downward to the lowest median nervule. This line 

 is distinctly edged with black on basal side and forms the most prominent 

 feature of the wing. Starting from lowest submedian nervule, one-sixteenth 

 inch inward from end of line just described, is another similar line running 

 to inner margin. There is also a linear white dash across outer border of 

 discoidal space. The prominent white line of fore wing extends downward 

 through the hind wing to the lower median nervule, and thence jaggedly to 

 inner margin, forming a W in anal angle area. The marginal indistinct white 

 line of fore wing also extends through hind wing, swerving inward at lower 

 portion and joining the first mentioned line at the lower median nervule. 

 Below this point of juncture, in the interspace, is a prominent rust-colored 

 spot, with a black speck at its lower edge. At the anal angle is a black spot 

 with an adjoining semi-circle of white above it, and above that a semi-circle 

 of rust color, which extends upward along inner margin. The border of 

 hind margin, for one-sixteenth inch inward, is dusted with light brownish 

 scales. There is an indistinct whitish line across outer border of discoidal 

 space. 



Taken by Mr. Gerhard in May, 1 899. 



Gorgythion difficilis A. G. Weeks, Jr. 1 



(Plate XIV, Figure 2.) 

 Habitat: Bolivia, near Cochabamba. Expanse: 1.40 inches. 



Head, thorax, abdomen and legs, very dark slate color, with some lustre ; 

 beneath, light gray. Antennae black, lighter below. 



Fore wing very dark slate color, with some lustre, marked with velvety 

 black and brownish. 



l Pr. New England Zool. Club, Vol. II, p. 82, November 9, 1901. 



