272 ■ PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxix. 



light reddish brown, outwardly shaded with darker brown. Second- 

 aries smoky grey; whitish at base; an outer whitish line. 



ExjMnse.- — Male, 33 ram. ; female, 35 mm. 



Habitat. — Tucmnan, Argentine Republic; Cayenne, French Guiana. 



This species is allied to R. xylinoides Walker. 



Type.— O^t. No. 8735, U.S.N.M. 



RIFARGIA OCCULTA, new species. 



Palpi and head dark reddish brown. Collar and thorax dark vio- 

 laceous brown; the patagia mottled with grey and light brown scales. 

 Abdomen blackish brown above, buff underneath. Primaries blackish 

 brown, the veins irrorated with black and grey; some small buff' spots 

 on outer half of costa; a round spot at end of cell finely outlined with 

 white, and containing some light brown scales; above it some tine 

 whitish lines; a fine, lunular, postmedial black line, faintly geminate; 

 a pale buff spot at apex crossed by a dark streak; a faint buff' narrow 

 marginal shade; terminal black lunules, shaded on either side with 

 buff; fringe brown; buff streaks at ends of veins. Secondaries black- 

 ish brown; fringe luteous. Underneath lighter brown; the outer mar- 

 gins buff; disc of secondaries shaded with buff'. 



Expanse. — Male, 54 mm. 



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



Type.— C^ii. No. 8736, U.S.N.M. 



RIFARGIA ONEROSA, new species. 



Head and thorax violaceous ))rown, the latter with luteous tufts 

 posteriorly; abdomen dull reddish brown; the anal segments blackish 

 grey. Primaries dull violaceous black; the base mottled moss green 

 and grey, limited by a curved pale line; the medial space on costa and 

 inner margin mottled with moss green; an antemedial and a postmedial 

 lunular dark brown line shaded with reddish brown; a similar spot at 

 end of cell, on which is a dark brown circle; the postmedial followed 

 by a row of small dark brownish shades; a light reddish brown streak 

 above vein 4, and one below vein 2; three brown spots on costa medi- 

 ally, followed by three buff spots toward apex; a large buff' spot at 

 apex, irrorated with reddish brown; a pale marginal shade between 

 veins 4 and 6; a wavy velvety terminal line, touching inwardly light 

 brown spots; fringe dark with light brown spots at ends of veins. 

 Secondaries violaceous brown; the fringe luteous; a darker spot at 

 anal angle. Underneath: primaries dark brown; the outer and inner 

 margins grey; a buff" spot at apex. Secondaries yellowish; a dull 

 brown submarginal ])and. 



Expanse. — 45 mm. 



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



Type.—Q^i. No. 8737, U.S.N.M. 



