260 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxix. 



Expanse. — 32 mm. 



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



Type.—C^t. No. 8706, U.S.N.M. 



MALOCAMPA MAYERI, new species. 



Body grey mottled with blackish grey; a dark brown shade poste- 

 riorly on collar. Primaries brownish grey, darker on costa, in cell, 

 and on outer margin; whitish irro rations at base and on inner mar- 

 gin; a l)lackish, geminate, lunular antemedial line; geminate black 

 medial lines on costa; a postmedial geminate black lunular line, some- 

 what inwardl}^ oblique from costa; dark velvety brown submarginal 

 spots above vein 4; marginal lilack spots between the veins preceded 

 by a lilacine shade. Secondaries lilacine brown, the veins and mar- 

 gins blackish brown. Underneath the primaries are dark lilacine 

 gre}', the inner margin and a postmedial costal spot whitish; the sec- 

 ondaries white, the basal half of costa and outer margin on apical half 

 dark lilacine gvo-y. 



Expanse. — 31 mm. 



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



Type.— C2it. No. 8707, U.S.N.M. 



Genus RHUDA Walker. 

 RHUDA DISSONA, new species. 



Palpi black, fringed with grey and brown. Head and collar olive 

 brown. Thorax duller brown; patagia black with white scales and a 

 lateral roseate shade. Abdomen grey brown above; the anal seg- 

 'ments darker; underneath yellowish. Primaries: on costa at one- 

 third from base to near apex a blackish space, posteriorly broadly 

 bordered with white from costa to end of cell, along vein 3, and up to 

 vein 5, above which it is edged by a fine lunular white line; this white 

 border is posteriorly shaded with roseate and followed by a dark 

 olive green shade, starting from costal margin at base to inner angle; 

 a white line from base to middle of submedian, below which the inner 

 margin is grey; outer half of inner margin olive brown; a marginal 

 wav}' olive brown line preceded by some dark irrorations on roseate 

 and white portion; the ends of veins yellowish, with yellow points at 

 tips interrupting a dark marginal line; ti'aces of a geminate postmedial 

 dark wavy line below vein 3. Secondaries dirty white; the costal 

 margin broadly brown, the base and inner margin broadly light 

 brown; a dark spot at anal angle. Underneath: primaries with the 

 black costal space as above followed below cell and on outer margin 

 by whitish; costa at base and inner margin 3'ellowish; a black streak 

 below cell to a black marginal patch l)elow vein 2; a marginal dark line, 

 and angled dark lines at ends of veins. Secondaries white; the costal 

 margin shaded with black; the base and inner area with yellowish. 



