South American Micro-Lepidoptera. 205 



light orange, sides and segmental margins shining grey, last two 

 segments grey, anal tuft whitish-ochreous. Posterior tibiae blackish, 

 with white basal, median, and apical rings. Forewings very 

 narrowly lanceolate, apex long-produced, caudate; dark bronzy- 

 fuscous; a fine oblique white subcostal line from base to about J, 

 and rather short fine white median and subdorsal lines beneath 

 apex of this, not nearly reaching base or band; costal edge white 

 for a short space before band ; a broad ochreous-yellow transverse 

 postmedian band, narrowed downwards, margined anteriorly by a 

 vertical golden-metallic fascia not quite reaching costa, followed by 

 a black subcostal dot, and posteriorly by two golden-metallic spots 

 preceded by two or three black scales, lower somewhat anterior, 

 with an ochreous-yellow long projection between these continued 

 as a gradually attenuated and whitening line to apex : cilia dark 

 grey, with white apical dash and whitish costal patch on posterior 

 edge of band. Hindwings and cilia dark grey. 



Peru, Lima, 500 feet, in August {Parish); twelve 

 specimens. 



Cosmopteryx mimetis, Meyr. 



British Guiana, Bartica, from December to February 

 {Parish) ; four specimens. Apparently cosmopolitan in 

 warm regions, and easily recognisable amongst its near 

 allies by having the two apical joints of antennae black. 

 The four preceding species are yellow-banded; this and 

 the five following are orange-banded. 



Cosmopteryx isotoma, n. sp. 



(J $. 9 mm. Head dark bronzy-fuscous, with fine white lines 

 above eyes, face lighter. Palpi white lined with black. Antennae 

 black lined with white, four apical joints white, then five (in $ four) 

 black, four (in $ five) white. Thorax dark fuscous, with three fine 

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

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

 subapical. Forewings very narrowly lanceolate, apex long-pro- 

 duced, caudate ; blackish ; a fine oblique white subcostal line from 

 base to J; short fine white median and subdorsal lines beneath 

 apex of this, widely remote from base and band; a broad light 

 orange postmedian transverse band, margined anteriorly by a 

 vertical golden-metallic fascia followed by a black subcostal dot, 

 and posteriorly by two golden-metallic spots preceded by some 

 blackish scales, lower slightly anterior, with a moderate pointed 

 orange projection between them, whence a fine somewhat inter- 

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



