Ko U'si. AMERICAN COCHLIDIAN MOTHS-DYAR. 393 



DICHROMAPTERYX OBSCURA, new species. 



Purplish brown, sharply limited on fore wings by a dull lilaceous 

 shade from middle of oosta to anal angle, apex again broadly darkened 

 with the basal color, faintly indicating a dark submarginal shade and 

 trace of discal bar. Hind wing blackish brown. 



Expanse.— ^^ mm. 



Localities. — Two males, St. Jean, Maroni Kiver, French Guiana; 

 Surinam River, Dutch Guiana (W. Schaus). 



Type.—Q^t. No. 9011, U.S.N.M. 



DICHROMAPTERYX DIMIDIATA, new species. 



Palpi, head, and thorax lilaceous, shading to brown on posterior 

 part of thorax and abdomen. Basal half of wings dark brown, paler 

 basally, sharply limited from middle of costa to anal angle. Apical 

 half pale lilaceous whitish, shading to brown at apex. Two super- 

 posed black discal points. Hind wings dark brown. 



Expanse.— 'iZ mm. 



Locality.— T^o males, St. Jean, Maroni River, French Guiana (W. 

 Schaus). 



Type.— C2ii. No. 9012, U.S.N.M. 



DICHROMAPTERYX ULTIMA, new species. 



Antennae of male simple, smooth, flattened, without serrations. 

 Head, fore legs, body, and base of fore wings dark chocolate brown, 

 on fore wings sharply limited by a whitish line, straight from middle 

 of costa to anal angle; ])eyond purplish brown, rather dark, suffused 

 with the basal color at apex, obli(]uely inward and curving to tornus. 

 Hind wings pale brown, lighter at base. Below uniformly pale 

 brown. 



Expanse. — 20 mm. 



One male in the University Museum at Oxford. 



Genus PROLIM ACODES Schaus. 

 Frolimacodes Schauk, Journ. N. Y. Ent. Soc, IV, 1896, p. 56. 



PROLIMACODES TRIANGULIFERA Schaus. 

 Prolimacodes triangulifera Schacs, Journ. N. Y. Ent. Soc, IV^, 1896, p. 56. 

 Locality. — Mexico. 



PROLIMACODES (?) GIBBOSA Sepp. 



Phals?na gibbosa Sepp, Surin. Vlind., 1848, pi. cxxix. 

 Locality. — Dutch Guiana. Not known to me in nature. 



