6O ILLUSTRATIONS OF UNFIGURED LEPIDOPTERA. 



Described from ten specimens from Alezuni, Bolivia. Absolute 

 identification from representatives of this genus in collections in 

 this country seemed impossible, but it was identified in London as 

 A. saundersii Hew., which I have from Colombia and Bolivia. The 

 yellow band of saundersii, however, is not so prominent and is en- 

 croached upon more by the rich ground color. The under side of 

 saundersii is quite different, the bright silver of helepecki being re- 

 placed by dead white, and the dark band of lower wing with its 

 silver interspacial spots showing in saundersii as a narrow dark 

 tawny band. While the location of silver or white spots is practi- 

 cally the same on each, the size of these spots differs totally, and the 

 bright tawny on under side of helepecki does not appear on saun- 

 dersii, but is replaced by a dark brownish. There is no variation 

 in the specimens that I have of helepecki, nor any sign of intergrad- 

 ing toward my specimens of saundersii. 



Ceratinia acceptabilis A. G. Weeks, Jr. 1 



(Plate XX.) 

 Habitat : Coroico, Bolivia. Expanse : 2.45 inches. 



Head black, with a white dot behind each eye. The eyes are encircled by a 

 fine white thread. Antennas black, with bright yellow club. Thorax, above, 

 black ; beneath, black with two transverse yellow lines. Abdomen, above, 

 black ; beneath, light yellow. Legs black. 



Fore wing, above, nearly all transparent, with a blackish tinge. The trans- 

 parent portion shows a mother-of-pearl lustre in some lights, as do all species 

 of this genus. The costa and hind margin are bordered with black for one- 

 sixteenth inch, somewhat broader at apex. The inner marginal area, up to 

 lower submedian nervule, is entirely black. The outer portion of discoidal 

 space and the portion of interspaces adjoining it, down to lower submedian 

 nervule, are transparent, but tinged with yellow instead of with black, as the 

 balance of the transparent portion is, giving the appearance of a broad yellow 

 band crossing the wing. This band is scarcely perceptible on direct examina- 

 tion, but by turning the insect at an angle, it shows prominently. The nervures 

 and nervules are black. The black of the nervule crossing the end of discoidal 

 space suffuses slightly at its central portion, causing it to appear as a prominent 



l Pr. New England Zool. Club, Vol. Ill, p. i, January 17, 1902. 



