NO. 1420. NEW SOUTH AMERICAN MOTHS— SCHA US. 339 



Expanse. — Male, 31 mm. 



Habitat. — St. Laurent, Maroni River, P'reuch Guiana. 



Type.—C-ai. No. 8929. U.S.N.M. 



PODALIA THANATOS, new species. 



Antenna and body black; some brownish transverse shades on abdo- 

 men. Tarsi tipped with pale buff. Primaries black; the apex and 

 outer margin grey white, crossed by pale olivaceous brown veins; a 

 subterminal row of black spots. Secondaries: base and inner margin 

 broadly black, otherwise gre}' white crossed b}^ pale olivaceous 

 brown veins. 



Expanse. — 31 mm. 



Hahitat. — Omai, British Guiana. 



Type.—C^i. No. S930. U.S.N.M. 



PODALIA HYALINA, new species. 



Frons, legs, and thorax dark brown. Vertex and collar ocherous. 

 Abdomen black; anal hairs ocherous. Wings hyaline. Primaries, 

 the veins and costal margin light brown; some darker brown at base 

 and along inner margin. Secondaries: the inner margin broadly 

 shaded with blackish brown. 



Expanse. — 30 mm. 



Hahitat. — Petropolis, Brazil. 



Type.—Qsi. No. 8931, U.S.N.M. 



Family COSSID.E. 



SYNOPSIS OF GENERA. 



Male antennfe bipectinate on basal half, the tip simple. 

 Hind wing with vein 8 free. 



Hind wing witli veins 4 and 5 from a point Azygophleps 



Hind wing with veins 4 and 5 separate Xyleutes 



Hind wing with vein 8 joined to the subcostal by a bar at end of cell Zeuzera 



Male antennae unipectinate, one row reduced to serrations. 



Hind wings with vein 8 free Hemipecten 



Male antennae simple, flattened. 



Hind wings with vein 8 joined to sul)COstal by a l)ar Miacora 



Male antennte bipectinate or biserrate to the tip. 



Hind wings with vein 8 joined to the subcostal by a bar. 



Sexes dimorphic; subcostal l)ar oblique Prionoxystus 



Sexes similar. 



Hind wings with veins 6, 7 from a point or stalked. 



Wings broad ; subcostal bar oblique Acossus 



Wings narrow, subcostal bar erect Girira 



Hind wings with veins 6, 7 separate at origin. 

 Vein Ic. of fore wings present. 



Frenulum distinct Ravigia 



Frenulum ol)Solete Philanglaus 



Vein Ic. of fore wings obsolete Langsdorfiu 



