VOL. 119 



104 PROCEEDINGS OF THE NATIONAL MUSEUM 



Type: Santarem, Brazil. USNM 66686. 



Distribution: brazil: Santarem. 



Described from male holotype, 7.27. (Z.), Santarem, Brazil. 



The specunen from which this species is described bears labels 

 indicatmg it had been compared with the type of Stenoma asthenopa 

 with which It agi-ees in color and maculation but in a darker shade. 

 Examination of the genitalia indicates that the specimen is not L 

 asthenopa but rather a new species. The apical spine on the anellar 

 lobes and the absence of cornuti in the aedeagus of the male genitalia 

 readily separates L. fusca from L. asthenopa and the other species of 

 Lethata. 



Lethata glaucopa (Meyrick), new combination 



FiGUEES la, 2a, 4/ 



Stenoma glaucopa Meyrick, 1912, Trans. Ent. Soc. London, vol. 1911, p. 712. 



Alar expanse 32-38 mm. 



Antenna whitish basaUy, darker beyond. Head rosy fulvous 

 lighter between eyes; second segment of labial palpus brown, apical 

 segment whitish. Legs whitish shaded with brown. Thorax brown 

 shaded with rose. Forewing brownish shaded with yellow with costa 

 narrowly rosy to brick red; spot at end of cell whitish with dark 

 gray center; cilia brown. Hindwing whitish, shaded with brown to 

 dark brown; cilia brown. 



Male genitalia (sHde WDD 2684): Uncus pointed, recurved- 

 gnathos short, broad at tip; harpe bluntly pointed at apex; anellar 

 lobes symmetrical, short, broad, nearly truncate at apex; aedeagus 

 large with slight lateral bend, apex with two laterally du-ected processes 

 at apex, one extending from each side, the larger one slightly recurved 

 vesica without cornuti. ' 



Female genitalia: Illustrated in Clarke (1955, p. 313, figs. 4-4c). 

 The illustration is not clear enough to provide a detailed description 

 of the female genitalia. 



Type: In the British Museum (Natural History). 



Type locality: San Antonio, Colombia, 5800 ft. 



Distribution: Colombia: San Antonio, 5800 ft. (Nov.). 



This is the largest species in the genus Lethata. It is known only 

 from the type, a female in the British Museum, and a male specimen 

 m the U.S. National Museum, both from the same locality. The 

 two laterally directed apical processes on the aedeagus in the male 

 genitalia readily separates L. glaucopa from the other species. 



