54 PIERFD^. 



Genus VII. N ATH A I I S Boisd. 

 Boisd. Sp. Gen. i. 589. (1836). 



Head rather broad, very hairy. 

 Eyes round, rather prominent. 

 Labial Palpi scaly at the base, very hairy beyond, projecting beyond the head. First joints 



rather stout, curved ; second rather shorter than the first, subcylindric, slightly tapering ; third 



joint one third the length of the first, slender, obovate, rather pointed. 

 Antenna? short, terminated by a short, obovate, compressed club. 

 Thorax rather slender, hairy. 



Anterior Wings rather elongate, rounded at the apex, or subtriangular. The subcostal nervure 



three-branched ; the first nervule thrown off beyond the middle of the cell ; the second exactly 



at the end of it. First discoidal nervule united for some distance beyond the cell to the 



subcostal. 

 Posterior Wings obovate, the cell rather short. Discoidal nervure separating from the subcostal at 



its bifurcation. 

 Legs small. Claws very long, deeply bifid, without paronychia. Pulvillus very minute. 

 Abdomen slender, about equal in length to the inner margin of the posterior wings. 



Larva and Pupa unknown. 



Nathalis may be known by its short abruptly clavate antennas ; the three-branched subcostal nervure of its anterior 

 wings ; the want of paronychia ; and the very small pulvillus, which resembles that of the Leucophasiae. 



The species on which Dr. Boisduval founded the genus has been met with in Mexico and Jamaica by different 

 collectors, and by myself on a mamelle upon the eastern shore of the Mississippi, nearly opposite to the mouth of the 

 Missouri. I there found it plentiful, flitting over the grass and low herbage. Its flight is slow and weak, but the 

 afternoon being cloudy few were actually on the wing. I never met with it afterwards, nor do I know of any other 

 person having captured it in the United States. 



NATHALIS Boisd. 



1. Nath. Ioi.e Boisd. Sp. Gen. i. 5Sp. n. 1. (1836). 



United States, Jamaica, Mexico. B. M. 



2. Nath. Plauta Boisd. MSS. 



Doubkday <$• Hewitson, t. 7. f. 4. (1847). 

 Venezuela. B. M. 



