NO. 3585 MICROLEPIDOPTERA, XII — DUCKWORTH 9 



yellow, a gray streak on dorsimi from basal fourth to apical three- 

 fourths; cilia whitish gray. Hindwings pale gray, costal third and 

 ciha suffused ochreous white. 



Male genitalia (shde WDD 3353, type): Uncus short, recurved; 

 gnathos heart-shaped at apex; harpe narrow, rounded at apex, with 

 two or more heavy setae on saccular margin, the innermost one borne 

 apically on distinct lobe; aedeagus pointed at apex, vesica armed 

 with numerous cornuti. 



Female genitalia: Unknown. 



Type: In the Naturhistorisches Museum, Vienna, Austria. 



Type-locality: Neu Bremen, Santa Catharina, Brazil. 



Distribution: Known only from the type-locality. 



The presence of a saccular lobe bearing a short, heavy, apical 

 seta on the harpe in the male genitalia readily distinguishes this 

 species. 



The transverse striae on the fore wing are unique in the genus 

 Lcthata and are very similar to the maculation found in the oecophorid 

 genus Psilocorsis Clemens. 



Letliata monopa, new species 



Plate 1 (fig. 2); Figures 3, 4; Map 8 



Alar expanse 33 mm. 



Antenna brown. Head fuscous; second segment of labial palpus 

 fuscous on outer side, light brown on inner side, apical segment light 

 brown. Legs brown. Thorax and tegula brown. Forewing brown 

 with costa and termen faintly ochreous; from anal angle an area of 

 fuscous shading extends upward and outward to near costa and spot 

 at end of cell; spot at end of cell consisting of a ring of light brown 

 enclosing a spot of slightly darker brown; at apical fourth a transverse, 

 outwardly curved faint fuscous line extending from costa to dorsum; 

 cilia brown basally, faintly ochreous apically. Hindwing gray, cilia 

 gray, lighter at anal angle. 



Male genitalia (slide WDD 3600, type) : Uncus short, recurved, 

 pointed at apex; gnathos broad, dorsoventrally flattened; harpe long, 

 rather narrow, broadly pointed at apex; anellar lobes symmetrical, 

 short, broad with slight posterior projections; aedeagus with a ventro- 

 lateral lump, apex broadly pointed, vesica armed with two clusters 

 of cornuti, one group with cornuti more than twice the length of the 

 other. 



Female genitalia: Unknown. 



Type: In the collection of the British Museum (Natural History). 



Type-locality: Rio de Janeiro, Brazil. 



Distribution: Known only from the type-locality. 



228-967—67 2 



