MICROLEPIDOPTERA OF JUAN FERNANDEZ ISLANDS — CLARKE 95 



wing brassy grayish; cilia grayish fuscous. Legs buff; fore- and mid- 

 legs shaded on outer sides with purpUsh fuscous ; posterior leg shaded 

 on outer side with grayish fuscous. Abdomen shining grayish fuscous 

 above, buff beneath; anal tuft grayish to buff. 



Male genitalia (slides 10411, 10445, 10447, 10735, 10760): Harpe 

 broad with bluntly pointed cucullus. Sacculus produced as a bluntly 

 pointed, short process. Vinculum rounded with a group of long, 

 slender scales from each side. Anellus very lightly sclerotized and 

 poorly defined. Aedeagus curved, distally flattened. Gnathos con- 

 sisting of two long processes dilated and spined distally. 



Female genitaha (slides 10722, 10736, 10737, 10757, 10759): 

 Ventral lip of ostium broadly expanded, posterior edge finely serrate. 

 Inception of ductus seminalis from a median sclerotized portion of the 

 ductus bursae. Signa two elongate, lightly sclerotized areas with 

 transverse ridge. 



Type: Masatierra: Piedra Agujereada (Mar. 12, 1955). 



Described from the type female, ten male and eight female para types 

 as follows: 2 cfcf , 2 99, Alto Frances, 500 m. (Mar. 2, 1951); d', 

 Cerro Alto, 600 m. (Feb. 1, 1952); cf , ElPangal, 350m. (Feb. 18, 1951); 

 20^^^,4 99, La Mona, 400-475 m. (Feb. 16, 1951, Jan. 30, 1955); 

 2cfcr, 2 99, Plazoleta del Yunque, 200 m. (Feb. 9, 1952); 2 d'cf , Salsi- 

 puedes, 400 m. (Mar. 5, 1951). 



A female has been selected as type because it is in good condition 

 and is, perhaps, more nearly representative of the average for the 

 species. At best, indiscriminata is extremely variable, ranging from 

 a nearly immaculate brownish shade to specimens with the basal 

 two-thirds of the forewing purplish fuscous and the outer third buff 

 or light brown with a few, scattered dark scales. One female has a 

 tawny forewing with a broadly triangular purplish-fuscous area 

 occupying the costal two-thirds except for the base and apex. 



The two species of this genus are similar in appearance but each 

 is endemic on its own island and is easily distinguished by genitalic 

 characters. 



Family Hyponomeutidae 



(ycnus Plutella Schrank 



Plutella maculipennis (Curtis) 



Cerostoma maculipennis Curtis, 1832, British entomology, vol. 6 (Lepidoptera 2), 

 pi. 420 (expl. p. 2 ). 



Distribution: Santa Clara: El Corral, cf, 2 99 (Jan. 6, 1952); 

 Masafuera: Quebrada de las Casas, cf , 9 (Jan. 19, 1952). 



A common pest of cruciferous plants rather generally distributed 

 throughout most of the world. 



