South American Micro-Lepidoptera. 225 



rather dark fuscous; markings snow-white, black-margined; a 

 fascia towards base, very broad on dorsum, narrowed to only 

 moderate on costa ; a moderate median fascia, narrowed towards 

 costa: a slightly oblique wedgeshaped spot from costa beyond f, 

 reaching | across wing; a smaller transverse wedgeshaped spot 

 from costa near apex : cilia fuscous, at apex with black basal and 

 median lines, whitish between these. Hindwings dark grey; cilia 

 grey. 



British Guiana, Bartica, in December {Parish); one 

 specimen. 



Acrocercops argocosma, n. sp. 



(J. 8-9 mm. Head white. Palpi long, slender, white. Thorax 

 fuscous, patagia white. Abdomen grey, towards base and apex 

 light greyish-ochreous. Forewings very narrowly elongate-lanceo- 

 late; light ochreous-fuscous ; markings snow-white, edged with 

 blackish scales ; a rather broad fascia at J, slightly broader dorsally ; 

 a broad median fascia, distinctly broader towards dorsum ; an 

 elongate spot on tornus ; an obliqu& fascia from costa above this, 

 narrowed almost to a point on termen; a slender rather oblique 

 transverse line before apex ; an apical dot : cilia light ochreous- 

 grey, opposite apex with black basal and median lines. Hindwings 

 grey; cilia light grey. 



Ecuador, Huigra, 4500 feet, in June (Parish) ; three 

 specimens. 



Acrocercops nolckeniella, Zell. 



British Guiana, Bartica and Mallali (Parish) ; several 

 specimens. A. sanctae-crucis, Wals., from the West Indies, 

 is only a synonym of this. 



Acrocercops chrysocosma, n. sp. 



(J $. 8 mm. Head shining metallic-bronze, face whitish-tinged. 

 Palpi very long and slender, bronzy-whitish. Thorax golden- 

 metallic, anteriorly suffused with bronzy. Abdomen dark grey, 

 towards apex ochreous-bronzy. Forewings extremely narrow, 

 parallel-sided, short-pointed; orange; a golden-metallic patch 

 extending on dorsum almost from base to near middle, above with 

 extremities silvery and touching costa (especially anterior), top 

 semiovally excavated between these and strongly black-edged, 

 or with costal space wholly blackish, posterior margin slightly 

 oblique, blackish-edged; a silvery-metallic blackish -edged spot on 

 middle of costa ; a larger svibquadrate golden-metallic blackish- 



TRANS. ENT. SOC. LOND. 1915. — PART II. (AUG.) Q 



