12 PROCEEDINGS OF THE NATIONAL MUSEUM Vol. 117 



longitudinally by a dark-brown line which fades gradually toward 

 dorsum; in costal half a few yellowish streaks; at outer end of cell, 

 at each angle, a small brown spot; a suiciilar spot on vein 8, about 

 midway between end of cell and apex, and another on tornus; four 

 ill-defined brownish spots on termen; cilia ocherous white with slight 

 brownish suffusion. Hindwing white with slight yellowish tint; cilia 

 white. Legs ocherous white suffused with brown. Abdomen ocherous 

 white with slight infuscation beneath. 



Female genitalia (slide 10669): Ventral lip of ostium twice as long 

 as broad, stout. Posterior half of ductus bursae stout, sclerotized; 

 anterior half membranous; inception of ductus seminalis at junction 

 of the two parts of ductus bursae. Signa the usual two, but one 

 greatly reduced in size. 



Type: Masatierra: Alto Pangal, 600 m. (Em., Mar. 24, 1955). 



Food plant: Juania australis (Mart.) Drude ex. Hook. f. (Palmae). 



Described from the unique female type. Both divus and jernan- 

 desellus are similar, and might be mistaken for each other, but the 

 dark dividing line of the forewing is short and sharply defined in 

 jernandesellus and long and diffused in divus. Although the extreme 

 edge of costa, basally, is dark in divus, there is a sharply defined, short 

 black line inside costa on jernandesellus. The female genitalia are 

 widely different as will be seen by a comparison of the figures. The 

 ventral lip of the ostium of Jernandesellus is essentially broadly tri- 

 angular while that of divus is oblong; the ductus bursae of divus is 

 sclerotized for half its length while that of jernandesellus is wholly 

 membranous. 



Of all the species of microlepidoptera collected in the islands, this 

 is the only one that was reared. A note by Dr. Kuschel, accompanying 

 the specimen, states "Larva: Alto Pangal, 600 m., Mar. 5, 1955, 

 en hojas nuevas y cerradas de Juania australis (Palmae). Ninfa: 

 Mar. 9, 1955. Imago: Mar. 24, 1955." A second note reads, "La 

 larva hace mucho dano en las hojas nuevas de la 'chonta' {Juania 

 australis)." 



Genus Fernandocrambus Aurivillius 



Fernandocr ambus Aurivillius, 1922, in Skottsberg, The natural history of Juan 

 Fernandez and Easter Island, vol. 3, pt. 2, p. 263. 



Type-species: Fernandocrambus hrunneus K\xv\w\)\ms,, op. cit., p. 264, 

 pi. 11, fig. 12 [hereby designated]. 



Key to the Species of Fernandocrambus 



1. Labial palpus buff shaded with drab or fuscous 2 



Labial palpus otherwise 5 



