South American Micro- Lepidoplera. 235 



anteriorly blackish-edged on costa; two blackish tufts rather 

 obliquely placed in disc about ^ : cilia dark grey, paler towards 

 tips. Hind-\vings dark grey ; cilia as in fore-wings. 



British Guiana, Bartica, in February (Parish) ; one 

 specimen. 



Dissoptila prozona, n. sp. 



(J. 7 mm. Head dark fuscous, face and palpi ochreous-whitish. 

 Thorax dark fuscous, sides and posterior margin whitish-ochreous. 

 Abdomen grey. Fore-wings elongate, narrow, costa gently arched, 

 apex pointed, termen extremely obliquely rounded; rather dark 

 fuscous, with faint purplish tinge; a broad whitish-ochreous fascia 

 near base, edges straight ; two large blackish tufts rather obliquely 

 placed in disc at 3^; a whitish-ochreous dot on middle of costa, one 

 in disc rather beyond this, and an inwardly oblique strigula from 

 costa at f ; a slender somewhat incurved whitish-ochreous fascia 

 from f of costa to tornus, narrowly interrupted in middle and with 

 narrow projections inwards on each side of this : cilia lilac-grey. 

 Hind-wings dark grey, subhyaline in disc anteriorly; cilia grey. 



British Guiana, Bartica, in February (Parish) ; one 

 specimen. 



Dissoptila mutabilis, n. sp. 



(J $. 9-10 mm. Head ochreous-whitish. Palpi white, faintly 

 greyish-tinged beneath apex of second and terminal joints. Thorax 

 whitish-ochreous, shoulders and anterior half of dorsum dark 

 fuscous, apex of patagia sometimes ferruginous -yellow. Abdomen 

 grey. Fore-wings elongate, narrow, costa slightly arched, apex 

 pointed, termen extremely obliquely rounded; pale yellowish- 

 ochreous or whitish-ochreous, sometimes only faintly clouded with 

 darker, often more or less wholly suffused with grey or dark grey 

 irroration; basal area sometimes mixed with ferruginous-yellow; 

 two large blackish tufts transversely placed in disc at |; often 

 longitudinal grey marks on costa before middle and about |; cilia 

 grey or dark grey, more or less suffused with ochreous-whitish or 

 whitish-ochreous towards base. Hind-wings rather dark grey, 

 paler and thinly scaled in disc anteriorly ; cilia grey. 



British Guiana, Bartica and Mallali, in February and 

 March (Parish) ; twenty-eight specimens. 



Dissoptila disrupta, n. sp. 



cJ ?. 9-10 mm. Head and palpi ochreous-whitish. Thorax 

 ochreous-whitish, shoulders and anterior lialf of dorsum suffusedly 



