38 PROCEEDINGS OF THE NATIONAL MUSEUM vol. H9 



coxa, scaled to one-third; maxillary palpus folded over base of tongue; 

 labial palpus recurved, second segment slightly longer than third, all 

 segments slender, apex acute; antenna simple, two-thirds to three- 

 fourths length of forewing, length of basal segments two-thirds width 

 in male, three-halves width in female, pecten absent. Forewing: 

 broadly lanceolate, apex broadly acute; 12 veins present; 6 closer to 

 7 and 8 than to 5 basally; 7 and 8 stalked, 7 to costa. Hindwing: 

 trapezoidal, outer margin moving gradually to termen, termen slightly 

 produced; 8 veins present; 3 and 4 approximate basally; 5 slightly 

 arched costally near base; 6 separate, straight; 7 slightly sinuous; 

 Ri running into Sc at one-sixth. Male genitalia: valva bilobate, 

 each lobe extending to base, costal lobe longer than ventral one; 

 saccus developed, tapering to apex; apex of juxta nearly attaining 

 apex of valva; aedeagus slender, a heavily sclerotized flange on caudal 

 half; manica heavily spined or unarmed; tegumen long; uncus shaped 

 like capital letter omega, wide scales on caudal margin; gnathos hook- 

 shaped; culcitida present. Female genitalia: signum absent; ductus 

 biu"sae heavUy sclerotized posteriorly, membranous anteriorly; 

 eighth abdominal segment almost membranous; ostium bursae near 

 anterior margin of eighth sternum; apophyses posteriores more than 

 twice length of apophyses anteriores. 



Ada is closely related to Lita but may be readily separated by 

 the bUobed valvae and the lack of a signum. The broad basal 

 antennal segments would appear to be a further development of some 

 Lita species that have thickened antennal segments. 



Only two species of Aria are known, and both of them are from the 

 western tier of states. 



Key to Species of Aria 



BASED ON MACULATION 



1. Frons gray white; forewing usually red brown; a brown spot above fold at 

 one-third, one on fold at one-half, and one above end of fold, one at two- 

 thirds length of cell, one at end of cell, and one on costa opposite one at 



end of fold; alar expanse 14.5-16.5 mm diversella (Busck) 



Frons streaked gray white and gray brown; forewing gray brown; three faint 

 brown spots on forewing, one at middle of fold, one in cell slightly beyond 

 one on fold, and one at end of cell; alar expanse 18.0-22.5 mm. 



tenuicornis Clarke 



BASED ON MALE GENITALIA 



1. Manica with scalelike spines; apex of flange of aedeagus acute; lateral margins 



of eighth tergum excavated anteriorly (fig. 90) . . . tenuicornis Clarke 



Manica without scalelike spines; apex of flange of aedeagus relatively blunt; 



lateral margins of eighth tergum straight (fig. 91) . . . diversella (Busck) 



