300 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 50. 



bent below cell ; orbicular a black point; reniform defined by a vertical 

 line inwardly and some spots outwardly; postmedial line deeply 

 lunular dentate; faint terminal spots on interspaces; cilia light brown. 

 Hind wings: A dark straight postmedial line; a short subterminal 

 line at anal angle. Fore wings below: Postmedial line almost straight; 

 a subterminal line on costa. Hhid wings below whitish grey, finely 

 irrorated with light brown; a dark discal point; postmedial line fine, 

 dentate; subterminal dentate, partly obsolete. 



Expanse. — 29 mm. 



Habitat. — St. Jean, Maroni River, French Guiana. 



Type.— Cat. No. 19741, U.S.N.M. 



UZOMATHIS, new genus. 



Male. — Palpi upcurved to well above head, slender, moderately 

 scaled. Antennae pubescent with minute cilia. Legs slender, 

 smoothly scaled, the forelegs with process. Wings narrow. Fore 

 wings: Apex rounded; outer margin obliquely rounded; veins 3, 4, 5 

 equally apart from lower angle; 6 and 7 from upper angle; 8-10 

 stalked from end of cell; 11 free; Hind wings: Veins 3 and 4 from 

 lower angle; 5 from well above angle; 6 and 7 from upper angle. 



Type of genus, — Uzomatlvis dissensa Schaus. 



UZOMAXmS DISSENSA, new species. 



Male. — Body and wings dark slate color. Fore wings: A black 

 basal line followed on costa by a pale annular spot; antemedial line 

 pale, indistinct, outcurved; medial space darker tinged; an incurved 

 yellow line on discocellular followed by a fuscous brown streak to 

 postmedial, wliich is pale, fine, and indistinct, deeply outcurved be- 

 yond cell, straight and inbent from vein 3 to inner margin; asubapical 

 yellowish line from costa to termen at vein 4. Hind wings shaded 

 with fuscous terminally near anal angle, traces of a pale outer line 

 preceded by a darker shade. Wings below duU dark gray. 



Expanse. — 17 mm. 



Hahitat. — St. Jean, Maroni River. 



Type.— C&t. No. 19742, U.S.N.M. 



Genus DYSPERALIS Warren. 



Dysperalis Warren, Ann. Mag. Nat. Ilist., ser. G, vol. 8, 1891, p. 64. 



Male. — Palpi upcurved reaching frons; second joint fringed in 

 front; third joint short, acute. Antennae minutely ciliated. Legs 

 smooth; spurs on hind tibiae long. Wings geometridlike. Fore 

 wings: Veins 3, 4, 5 from lower angle, equally apart; 6 below upper 

 angle; 7 from upper angle; 8, 9, 10 stalked; 11 free. Hind wings: 



