280 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxix. 



a darker brown shade at base of costa; and oblique antemedial, broad, 

 dark steel grey shade from costa across cell; a small velvety black 

 spot in cell, one below cell, and one on submedian vein; an outer gem- 

 inate row of black points on veins, followed by dark streaks between 

 the veins; marginal dark grey elongated spots between the veins, 

 edged with black which extends on to fringe. Secondaries dark 

 brown. 



Expanse. — 50 mm. 



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



Type.—C^t. No. 8755, U.S.N.M. 



Genus NAVARCOSTES, ne^Ar genus. 



Antennge pectinated in both sexes to beyond the middle. Palpi 

 thick, reaching- beyond frons; the third joint short, a tuft of hair on 

 either side of frons. Legs with thin tufts of hairs; tarsi smooth. 

 Abdomen extending beyond hind wings. Primaries long and narrow; 

 veins 3 and 4 well apart; vein 5 from near upper angle of cell; vein 6 

 from middle of areole; 7, 8, 10 from end of areole. Secondaries some- 

 what triangular; veins 3 and 4 from lower angle of cell; 5 very weak 

 or absent; 6 and 7 on short stalk. 



NAVARCOSTES LIMNATIS, new species. 



Palpi, head, and collar reddish brown. Thorax lilacine; a blackish 

 spot posteriorly; a large white spot on shoulders. Abdomen dark 

 greyish brown above; luteous underneath and at anus. Primaries 

 grey, thinl}^ irro rated with brown; a geminate black basal line from 

 costa to submedian, followed by a large whitish spot below cell; a 

 black point in cell; another at end of cell; three antemedial brown 

 lines; a medial and three postmedial black marks on inner margin; 

 traces of two ])rownish postmedial lines, followed by a series of small 

 brown intervenal spots; an interrupted wavy l)lack outer line; sub- 

 marginal brown spots and streaks below costa; marginal black spots 

 between the veins; a buff space at apex. Secondaries greyish brown. 

 Underneath whitish; a medial wavy dark line, basal anterior half of 

 primaries blackish; outer and marginal blackish spots on primaries. 



Expanse. — Male, 43 mm. 



Hahitat. — St. Jean, French (iiuiana. 



Type.—OAX. No. 8756, U.S.N.M. 



Genus PAMCOLOMA, ne^w genus. 



Antenna? fasciculate. Palpi hairy, extending above frons; third joint 

 minute; legs hairy. Primaries: outer margin obliquely rounded; vein 

 5 from near upper angle; 6 from middle of areole; 7, 8, 10 from end 

 of areole; 2 and 3 near together from lower angle. Secondaries: the 

 costal margin convex at base; outer margin round(Hl; 2 and 3 from 



