South American Micro-Lepidoptera. 71 



Ethirostoma interpolata, n. sp. 



(J?. 9 mm. Head, thorax oclireous- whitish. Palpi whitish, second 

 joint with whorls of blackish-grey white-tipped scales roughly and 

 angularly projecting beneath, terminal joint with blackish supra- 

 median ring. Forewings elongate, costa faintly smuate, somewhat 

 bent at f, apex obtuse, termen obliquely rounded; brownish- 

 fuscous, tips of scales minutely whitish, forming a very fine trans- 

 verse striation; dark fuscous dots towards costa near base and at 

 J and ^, and two above and below fold at J ; stigmata dark fuscous, 

 plical rather obliquely before fu'st discal; a gradually expanded 

 streak of dark fuscous suffusion along costa from ^ to subterminal 

 line, cut by an oblique white strigula from middle of costa ; a nearly 

 straight whitish line from ^ of costa to tornus, hardly angulated 

 in middle, beyond angle a short black dash, sometimes a second 

 more minute indicated beneath it : cUia fuscous speckled whitish, 

 base whitish -Rdthin a dark; brown line. Hindwings dark grey; 

 cilia grey. 



Brazil, TefEe, in December; Peru, Jurimaguas, in 

 March; five specimens. 



Commatica extremella Wallv. 



Differs from chionura Meyr. only in possessing two white 

 dots in ciha of forewings between subterminal line and 

 praeapical dot, sometimes terminated with greyish- 

 ochreous beneath. This difference appears to be constant 

 and localised, extremella being characteristic of Teffe 

 (the original locality), whence I have fourteen specimens, 

 whilst I have a long series of chionura from other Amazon 

 localities from Para to Iquitos. 



Commatica stygia, n. sp. 



(J. 9 mm. Head, palpi, thorax dark fuscous, terminal joint of 

 palpi whitish posteriorly. Forewings elongate, costa gently arched, 

 apex obtuse, termen very obliquely rounded; dark fuscous; a 

 faint mterrupted fine whitish line from f of costa to tomus, acutely 

 angulated in middle and very near margins throughout : cilia grey, 

 two dark fuscous lines. Hindwmgs dark grey; a grey expansible 

 hairpencil lying in disc from base to middle; cUia grey. 



Brazil, Parintins, in October; one specimen. Next 

 eremna. 



