206 Mr. E. Meyrick's Descriptions of 



wliite apical dash, and white costal spot on posterior margin of 

 band. Hindwings and cilia dark fuscous. 



British Guiana, Bartica, in December and February 

 {Parish) ; two specimens. Much like the following species, 

 but larger, and distinguished from all by the broad ante- 

 penultimate white band of antennae. 



Cosmopteryx erasmia, n. sp. 



(J $. 7-8 mm. Head dark fuscous, crown with three fine white 

 lines, face bronzy. Palpi white lined with black. Antennae 

 blackish lined with white, four apical joints white, then five black, 

 one white, one black, two white. Thorax dark fuscous, with three 

 fine white lines. Abdomen dark fuscous. Posterior tibiae black, 

 with silvery-metallic basal, median, and subapical rings, and white 

 apex. Forewings narrow-lanceolate, apex long-produced, caudate ; 

 blackish ; dorsal edge veiy finely white towards base ; a fine oblique 

 white subcostal line from very near base to ^; short fine white 

 median and subdorsal lines beneath apex of this, \ridely remote 

 from base and band ; a broad orange transverse postmedian band, 

 margined anteriorly by a vertical golden-metallic fascia not quite 

 reaching costa and followed by a black subcostal dot, and posteriorly 

 by two golden-metallic rather oblique spots edged anteriorly with 

 blackish, lower rather anterior, with a narrow pointed orange pro- 

 jection between them, whence a more or less interrupted slender 

 silvery-white streak runs to apex : cilia dark fuscous, with a white 

 apical dash, and a white costal spot on posterior margin of band. 

 Hindwings and cilia dark fuscous. 



British Guiana, Bartica, from February to April 

 {Parish) ; four specimens. Extremely similar to mimetis, 

 but rather smaller, and immediately distinguished by 

 white apex of antennae. 



Cosmopteryx thrasyzela, n. sp. 



^ $. 7-8 mm. Head dark bronzj^-fuscous, crown with three 

 fine white lines, face metallic-bronze. Palpi white lined with black. 

 Antennae blackish lined with white, four apical joints white, then 

 five black, one white, one black, one wliite. Thorax blackish, with 

 three fine white lines. Abdomen dark fuscous. Posterior tibiae 

 black, with silverj'-metallic basal, median, svibapical, and apical 

 rings. Forewings narrow-lanceolate, apex long-produced, caudate ; 

 blackish; a fine oblique white subcostal line from near base to \; 

 short fine white median and subdorsal lines beneath apex of this, 



