6 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 122 



35. Ductus bursae membranous; ostium bursae sclerotized, with two lateral 



pouches; ostium V-shaped trochalosticta (Walsingham) 



Ductus bursae partially sclerotized or with patch of spines; ostium bursae 

 without lateral pouches; ostium not as above 36 



36. Ductus bursae with small patch of spines near inception of ductus seminalis. 



bovinella (Busck) 

 Ductus bursae without spines 37 



37. Ductus bursae with sinuous, ribbon-like sclerotization from ostium bursae 



to inception of ductus seminalis invigilans (Meyrick) 



Ductus bursae not as above 38 



38. Ostium a heavily sclerotized ring; ostium bursae with heavily sclerotized 



corrugations buscki Duckworth 



Ostium not a heavily sclerotized ring; ostium bursae sclerotized, partially 

 divided at middle by incomplete, internal partition from lateral wall. 



illustra, new species 



Lethata trochalosticta (Walsingham) 



Figure 31; Map 1 



Stenoma trochalosticta Walsingham, 1913, in Godman and Salvin, Biologia Centrali- 

 Americana, vol. 42 (Lepidoptera-Heterocera, vol. 4), p. 177. 



Female genitalia (slide WDD 3597) : Ductus bursae membranous; 

 ostium bursae sclerotized, with two lateral pouches extending from 

 ostium to midpoint of ostium bursae; ostium irregular, V-shaped; 

 inception of ductus seminalis near midpoint of ductus bursae. 



Type: In the U.S. National Museum. 



Type-locality: Chiriqui, Panama. 



Distribution: Panama: Chiriqui (no date). Costa rica: Sixaola 

 Rio (no date) ; Turrialba (February, March). Ecuador: Balzapamba, 

 Pr. Bolivar (no date). 



Two female specimens collected by the author in Costa Rica pro- 

 vided the basis for the above description and are the first representa- 

 tives of this sex obtained thus far. 



The specimen from Ecuador has considerably more reddish-brown 

 shading on the fore wing, causing the general appearance to be much 

 darker; however, the maculation is unchanged. 



The two lateral pouches in the ostium bursae readily separate the 

 females of L. trochalosticta from all other species. 



Lethata anophthaltna (Meyrick) 



Map 2 



Stenoma anophthalma Meyrick, 1931, Exotic Microlepidoptcra, vol. 4, p. 36. 

 Stenoma badiella Amsel, 1956, Bol. Ent. Venezolana, vol. 10, p. 298. 

 Lethata maculata Duckworth, 1964, Proc. U.S. Nat. Mus., vol. 116, p. 106. 



Type : In the Naturhistorisches Museum, Vienna. 



Type-localities: Fiebrig, Paraguay (anophthalma); Caracas, Los 



