16 



PROCEEDINGS OF THE NATIONAL MUSEUM 



Vol. 117 



Type: Masatierra: Bahia Cumberland (Feb. 15, 1951). 



Described from the type male and 21 male and female paratypes 

 as follows: Masatierra: Bahia Cumberland, 12crcf, 9 99 (February 

 and March dates, 1951). 



The male genitaha place this species nearest to arcus from which 

 it is distinguished by the very long vinculum. The female, however, 

 suggests a closer relationship with truncus. 



Figures 8-9. — Fernandocrambus oxyechus, new species: 8, ventral view of male genitalia 

 with left harpe and aedeagus removed; 8a, lateral aspect of aedeagus; 9, ventral view of 

 female genitalia. 



Fernandocrambus arcus, new species 



Figures 10-11 



Alar expanse 20-27 mm. 



Labial palpus dark gray, the scales cinereous tipped. Antenna 

 gray except base which is fuscous; scape tipped with cinereous above. 

 Head and thorax dark gray with the scales cinereous tipped; face 

 fuscous; tegula tipped with cinereous. Forewing groimd color gray- 



