NE W SO UTH A ME RICA N MO TIIS—SCHA US. 261 



Expanse. — 57 mm. 



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

 Easily distinguished by the pale outer margin of secondaries. 

 Type.—OAt. No. 8708, U.S.N.M. 



RHUDA GEOMETRICA, new species. 



Head and thorax grayish olive brown; a whitish lateral streak on 

 patagia. Abdomen brownish grey above, yellow underneath. Pri- 

 maries: a large dark olive green space on costal margin at one-third 

 from base, oblique to vein 3, straight along 4 for half its length, then 

 oblique to costal margin near ai)ex; the costa on outer half of this 

 space shaded with grey, with some Ijlack spots on extreme costal mar- 

 gin; a broad whitish shade behind this space; from base of costa a 

 dark green shade, becoming dark brownish beyond basal third and 

 occupying all the space below cell and vein 2, except the basal third 

 of inner margin which is gre}', anteriorly bordered by a white line; a 

 black outer spot on vein 2, outwardly shaded with white and preceded 

 by a fine geminate wavy ])lack line from vein 3 to inner margin; 

 black marginal sti'eaks connecting the veins, very faint above vein 4; 

 the outer margin brown below vein 4; only the fringe brown above 

 it. Secondaries 3^ellow; the outer half of costal margin and the outer 

 margin broadly black; fringe 3'ellow. Underneath the primaries are 

 blackish brown; the veins j^ellowish; the inner margin broadly j^ellow; 

 a yellow ol)liciue shade from basal third of costa across cell, extending 

 slightly between veins 2 and 4. 



Ex-panse. — 02 mm. 



Habitat. — Rio Janeiro, Brazil. 



Type.^^^X. No. 8709, U.S.N.M. 



RHUDA MINOR, new species. 



Head and thorax mottled brown and grey; a black spot anteriorly 

 on patagia. Abdomen brown above, yellowish underneath. Prima- 

 ries: a dark olive green costal space as in geonietrica Schaus, edged 

 by a white line slightly dentate basally on costa and onl}- reaching 

 vein 6 outwardly; some grey shades on costa on outer half of this 

 space and three black dentate lines between veins 6 and 10; the white 

 line posteriorly followed by a broad roseate shade; an olive green 

 shade from base of costa below cell and vein 2 to outer margin; a 

 white line below it from base to just beyond middle of submedian; 

 below this a bluish grey streak below submedian; a postmedial gemi- 

 nate dark wavy line from vein 4 to inner margin, followed below vein 

 2 by a black spot, outwardly bordered with whitish; a wav}^ marginal 

 irregular dark line; terminal brown shades chiefly below vein 4; pale 

 streaks on tips of veins. A velvety })lack point in cell. Secondaries: 

 the costal and outer margins broadly dark brown with the veins 



