24 PROCEEDINGS OF THE NATIONAL MUSEUM Vol. 117 



In his description of this species Aurivillius included specimens 

 from Masafuera but all the Masafuera specimens belong to the closely 

 similar new species, kuscheli, which follows, 



I have examined eight slides of the genitalia of this species, in- 

 cluding the type, and all agree. The male genitalia are figured 

 from a specimen from Plazoleta del Yunque (slide 10146), and the 

 female from a specimen from Bahia Cumberland (slide 10148). 



The series from Bahia Cumberland contains one specimen with an 

 unusual amount of white scaling on forewing, so that the specimen 

 is grayish in aspect, but the genitalia place it here. 



In the Naturhistoriska Rilvsmuseum, Stockholm, there is a female 

 of this species labeled "Masafuera." It appears that the Stockholm 

 specimen was mislabelled because hackstromi is confined to Masatierra. 



Fernandocrambus kuscheli, new species 



Figures 19-20 



Alar expanse 14-22 mm. 



Labial palpus drab, paler above and inwardly. Antenna drab, some- 

 what lighter basally and darker apically. Head buff. Thorax and 

 forewing drab; basal fourth of costa darker; from base of wing to end 

 of cell a grayish-buff longitudinal streak broader at end of cell than at 

 base; at the end of cell a few scattered fuscous scales; around termen 

 an ill-defined series of small fuscous spots; cilia light drab with a few 

 darker scales mixed. Hindwing grayish fuscous, cUia grayish buff 

 with a dark subbasal line. Legs grayish bujff overlaid with drab. 

 Abdomen grayish fuscous above, grayish buff beneath. 



Male genitalia (slide 10598 [type], 10599): Similar to bdckstromi 

 but easily distinguished from it by the shape of the armatm'e of the 

 aedeagus. In bdckstromi there is a strong, curved apical hook but in 

 kuscheli this takes the form of a barb, rather than a hook, with a 

 strong spine directed basad. 



Female genitalia (slide 10641): The only significant difference 

 between the female genitalia of bdckstromi and kuscheli lies in the shape 

 of the ventral lip of the ostium. In bdckstromi this is subrectangular 

 in outline but in kuscheli it is broad basally and triangular. 



Type: Masafuera: La Correspondencia, 1150 m. (Jan. 28, 1955). 



Described from the type male and 61 male and female paratypes as 

 follows: Masafuera: Inocentes Bajos, 1000 m., Tcfcf , 2 99 (Jan. 27, 

 1952); La Correspondencia, 1150 m. IScfd', 23 99 (Jan. 25 to Feb. 21, 

 1955); Quebrada de la Calavera, 9 (Jan. 15, 1952); Quebrada de las 

 Casas 1&&, 5 99 (Jan. 16-19, 1952, Feb. 21, 1955); Quebrada de las 

 Vacas, 9 (Jan. 17, 1952). 



Superficially kuscheli is indistinguishable from bdckstromi, particu- 

 larly when the specimens are worn, but the females of the latter 



