6 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 119 



6. Clasper of left valve short, apex scarcely reaching apical third of valve . . 7 

 Clasper of left valve long, reaching beyond apex of valve 9 



7. Sacculus of right valve with a spine projecting from the dorsal margin (fig. 



29) extensa (p. 17) 



Sacculus of right valve lacking a spine on the dorsal margin (figs. 25 and 

 27) 8 



8. Clasper of left valve nearly straight, apex slightly clubbed (fig. 25). 



lelae (p. 16) 

 Clasper of left valve hooked, apex usually pointed (fig. 27) . splendens (p. 13) 



9. Clasper of right valve short, reaching about to middle of valve (fig. 31). 



robertae (p. 18) 

 Clasper of right valve long, reaching slightly beyond apex of valve (fig. 34). 



paraguayensis (p. 19) 



Eusceptis obscura (Schaus), new combination 



Figures 7, 8, 22 



Acontia obscura Schaus, 1898, Journ. New York Ent. Soc, vol. 6, no. 2, p. 117. 



Eugraphia obscura (Schaus). — Hampson, 1910, Catalogue of the Lepidoptera 

 Phalaenae in the British Museum, vol. 10, p. 795, pi. 174, fig. 3. — Draudt, 

 1939, in Seitz, Gross-Schmetterlinge der Erde, vol. 7, p. 397. 



Acontia trilinea Schaus, 1898, Journ. New York Ent. Soc, vol. 6, no. 2, p. 117. 

 [New synonymy.] 



Eugraphia trilinea (Schaus). — Hampson, 1910, Catalogue of the Lepidoptera 

 Phalaenae in the British Museum, vol. 10, p. 795, pi. 174, fig. 2. — Draudt, 

 1939, in Seitz, Gross-Schmetterlinge der Erde, vol. 7, p. 397. 



The uniformly black hindwings of this species separate it from all 

 the other known species of the genus. Length of forewing: male, 

 16 mm.; female, 17mm. 



Types: The type of obscura (USNM 10658), a female from Guada- 

 lajara, Mexico, and that of trilinea (USNM 10659), a male from 

 Jalapa, Mexico, are in the collection of the U.S. National Museum. 



Distribution: Known only from Guadalajara and Jalapa, Mexico. 

 Only four specimens are kno^^^l to have been collected. 



Remarks: Schaus indicated in the original descriptions that 

 trilinea (fig, 7) and obscura (fig. 8) might represent the two sexes of 

 a single species. The two names apply to the same species, but it 

 is possible that the specimen named trilinea may represent a distinct 

 form. The two known male specimens have the same genitalia 

 (fig. 22) , but they differ in maculation of the forewing, one specimen 

 being dark like the type of obscura. Because only two males are 

 available for study, it is not known whether specimens exist that are 

 intermediate in maculation of the forewing between the dark type of 

 obscura and the orange-streaked type found in trilinea. The solution 

 of this problem must of necessity await the collection of more speci- 

 mens of this species. 



Method of determination: By examination of the type. 



