64 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.47. 



a large, central, velvety brown patch and blackish browTi, posterior 

 tuft; patagina with a velvety brown spot at base. Forewings viola- 

 ceous white with strong iridescent reflections; sparsely scaled; semi- 

 transparent; dusted with light brown, each scale having a light 

 blown dot; along the veins, especially on dorsal half, are interrupted 

 lines of scattered black scales; near apex are three small costal and 

 three small dorsal blackish brown spots; cilia white, sprinkled with 

 black. Hindwings hyaluie, bluish, iridescent with darker veins and 

 yellowish white cilia. Abdomen long and robust, sparsely clothed 

 above with rusty brown, below with rusty white scales; anal tuft 

 yellowish. Legs white sprinkled with brown and with broAvn tarsal 

 joints. 



Alar expanse. — 22-42 mm. 



Habitat. — Cabima, Porto Bello, and Alhajuela, Panama, April to 

 October. 



Type specimen.— Cat. No. 16767, U.S.N.M. 



The United States National Museum possesses a large series of this 

 singular species from Orizaba and Jalapa, Mexico, Sixola River and 

 Juan Vinas, Costa Rica, W. Schaus, collector, and from Misantla, 

 Mexico, R. MuUer, collector. 



Genus AMYDRIA Clemens. 



Type. — Amydria effrenatella Clemens. 



AMYDRIA UMBRATICELLA, new species. 



Brush on second joint of labial palpi dark brow^l mottled with 

 black; terminal jomt brown with two, ill-defined and indistinct, black 

 annulations. Face light ochreous. Head somewhat darker ochreous. 

 Thorax black. Forewing light ochreous suffused with brown and 

 black; entire costal edge broadly black; a round black dot at the end 

 of the cell; the area between this dot and tornus strongly mottled 

 with black and dark brown; a small black dot at the base of dorsal 

 edge; entire wmg irregularly sprinkled with single black and brown 

 scales; cilia light ochreous mottled irregularly with black. Hind- 

 wings dark brownish fuscous with lighter ochreous cilia. Abdomen 

 dark brown. Legs dark bro^vn; tarsi broadly annulated with black. 

 The males are much smaller than the females and rather lighter in 

 color. 



Alar expanse. — Females, 20-22 mm; males, 11-14 mm. 



Habitat. — ^La Chorrera, Alhajuela, Porto Bello, and Trinidad River, 

 Panama. March and June. 



Type-s'pecimen.—Cd.i. 16768, U.S.N .M. 



Commonly taken in copulation, in the thatched roofs of native 

 houses and at light. 



