3546 MOTHS OF GENUS EUSCEPTIS — TODD 5 



Outer, dark costal mark of forewing looped basad immediately above lower 

 angle of cell; orange terminal line of forewing curved around apex, nearly 

 reaching costa koehleri (p. 11) 



Outer, dark costal mark of forewing usually not looped basad above lower 

 angle of cell; orange terminal line of forewing not curved around apex. 



irretita (p. 10) 



Dark basal part of ocellate spots of postmedian area of forewing separate; 

 fringe usually paler than oblique bar, especially at outer edge .... 7 



Dark basal part of ocellate spots of forewing united into a sinuous line; fringe 

 uniformly dark 9 



Hindwing of male mostly white with orange near outer margin only; sub- 

 terminal, oblique, gray bar of forewing of female wider at basal end than at 

 apex extensa (p. 17) 



Hindwing of male mostly orange; subterminal, oblique, gray bar of forewing 

 of female usually widest near apex; distal yellow area level with apex of 

 Cu2 as wide as or wider than base of oblique, gray bar 8 



Fringe of forewing more or less concolorous with gray terminal line; terminal 

 line extending from dark apex almost to tornus (South America). 



splendens (p. 13) 



Fringe of forewing usually paler than gray terminal line; terminal line not 

 reaching apex or crossing anal vein (Central America) . . lelae (p. 16) 



Hindwing of male orange; oblique, subterminal, gray bar of forewing divided 

 or paler at middle; hindwing of female lacking a fuscous spot at apex. 



robertae (p. 18) 



Hindwing of male with basal half whitish; oblique, subterminal, gray bar not 

 divided or paler at middle; female with fuscous spot present at apex of 

 hindwing paraguayensis (p. 19) 



Key to Males of Eusceptis 



(Based on genitalia) 



Valves lacking a corona (figs. 19 and 20) 2 



Valves with a conspicuous short corona (example, fig. 22) 3 



Sacculus of right valve greatly enlarged, right valve with clasper present 



distad of sacculus (fig. 20) koehleri (p. 11) 



Sacculus of right valve not enlarged, subequal to sacculus of left valve, valves 



simple, clasper absent (fig. 19) irretita (p. 10) 



Left valve lacking a clasper (fig. 22) ob.scura (p. 6) 



Left valve with a clasper (example, fig. 23) 4 



Sacculus of left valve more than half as long as valve, apex of sacculus pro- 

 duced into a large dorsally directed spine (figs. 23 and 24) 5 



Sacculus of left valve short, usually decidedly less than half as long as valve, 

 spine of sacculus small or arising from near middle of costal margin (exam- 

 ple, fig. 27) 6 



Costal spine of sacculus of right valve longer than distance from its base to 

 apex of sacculus; sacculus of left valve only slightly wider than sacculus of 



right valve (fig. 24) effusa (p. 7) 



Costal spine of sacculus of right valve shorter than distance from its base to 

 apex of sacculus; sacculus of left valve distinctly wider than sacculus of 

 right valve (fig. 23) atriora (p. 8) 



