64 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 65. 



Expanse. — 30 mm. 

 Habitat. — Tactic, Guatemala. 

 Type.— Csit. No. 25606, U.S.N.M. 

 The antennae are simple. 



PILETOSOMA CHAQUIMAYALIS. new species. 



Male. — Antennae simple, dark brown above, whitish below, also 

 tips. Palpi fuscous, base below, throat, and fore femora light 

 orange yellow. Body above purplish fuscous, underneath and legs 

 whitish yelloAv. Wings rather thinl}' scaled in disk Vandyke brown 

 tinged with iridescent purple, the veins on fore wing and costal 

 margin fuscous purple. Wings below paler. 



Expanse. — 32 mm. 



Habitat. — Chaquima3'a, Peru. 



Type.— Cat No. 25607, U.S.N.M. 



PILETOSMA GUIANALIS. new species. 



Mal^. — Palpi orange buff with a gi-ayish streak above. Antennae 

 with ridge of hairs along the third fourth, brown, the terminal 

 fourth white. Frons fuscous gray with metallic blue scaling ; vertex 

 sayal brown. Collar and thorax dusky slate-violet. Abdomen above 

 dusky slate-violet, underneath orange buff; thorax below orange buff, 

 the legs whitish yellow, fore femora orange buff. Fore wing silky 

 vandj'ke brown, the costa dark purplish; faint semihyaline markings 

 at end of cell, below ceil and beyond cell on interspaces, these mark- 

 ings are more pronounced in the female. Hind wing the same, but 

 the semihyaline markings still less distinct, the termen narrowly 

 tinged with black; anal angle slightly lobed with small fovea. Wings 

 below lighter brown. 



Expanse. — 27 mm. 



Habitat. — Rockstone, British Guiana; also from French Guiana. 



Type.— Cat. No. 25608, U.S.N.M. 



SYLEPTA MITANALIS, new species. 



Female. — Palpi white, the end of second joint with a buff ring. 

 Head white; frons with some drab shading. Collar gray brown 

 tipped with white. Thorax dark purple in front, white behind; 

 patagia silky gray, dorsally edged with cream color. Abdomen dor- 

 sally buff brown with medial dark brown spots; laterally with fus- 

 cous brown spots; none of the spots extend on to the last two segments. 

 Legs and tarei white. Fore wing silky brownish drab; costal 

 margin white between the two lines; basal and subbasal interrupted 

 white lines across costal nuirgin and cell : a white basal spot on inner 

 margin; a fine dark antemcdial line defined by whitish shading on 

 either side and with a more distinct small white spot inwardly be- 



