38 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.47. 



Alar expanse. — 15-17 mm. 

 Habitat. — Trinidad River, Panama, Marcli. 

 Type-specimen.— Qiii. No. 16706, U.S.N.M. 



Reminding in size, color, and ornamentation of our North Ameri- 

 can Agonopteryx curvilinieTla Beutenmiiller. 



Genus ATHLETA Walsingham. 

 Athleta Walsingham, Biologia Centrali-Americana, vol. 4, Heterocera, 1912, p. 155. 



Type. — Atlileta trisecta Walsingham. 



In the description of the genus Athleta vein 2 of the forewmg is 

 given as separate and distant from vein 3. Such, however, is not 

 always the case in the type species under consideration. With 

 several additional specimens from Porto Bello and Trinidad River, 

 Panama, it is found that this character is not stable \\dthin the spe- 

 cies, but that vein 2 may be separate, connate, or even short stalked 

 with vein 3. wSimilar instabihty of these vems within the species is 

 found in other groups of this family and makes the character of little 

 value generically. The genus Atlileta may, how^ever, be separated 

 from its nearest ally, Catarata Walsingham, by the anastomosis of 

 veins 2 and Ic, which appears to be constant; from whatever start- 

 ing point vein 2 runs nearly at right angles downward and into vein 

 Ic, separating from it again just before tornus. The male of this 

 species, which was not known at the time of the description, has a 

 very noticeable short fold along vein 1& of the hindwings, which 

 contains a large expansible tuft of yellowish hairs 



ATHLETA NIGRICANS, new species. 



Labial palpi white sprinkled with dark fuscous; second joint with 

 two ill-defined dark fuscous bars exteriorly, one at base and one near 

 the tip; terminal joint with a dark fuscous annulation at the base, 

 one just before the tip and a dark intermediate spot in front. Face 

 silvery white. Head white, slightly mixed with fuscous. Thorax 

 dark brown with anterior edge and base of patagma wliite. Fore- 

 wing dark brownish fuscous with cilia and terminal edge silvery 

 white; extreme base of costa and apical two-thirds of costal edge 

 silvery white also. Hindwing dark fuscous with ciha a shade lighter. 

 Abdomen dark fuscous above, silvery white on the underside. Legs 

 silvery white with anterior tibise and tarsi barred with dark brown 

 and with posterior tibiae yellowish. 



Alar expanse. — 12 mm. 



Habitat. — Trinidad River, Panama, June. 



Type-specimen. ~Q2ii. No. 16708, U.S.N.M. 



Resembling in coloration and markings Stenoma marginata Busck. 

 (See p. 49.) 



