South American Micro-Lepidoptera. 237 



dark purplish-fuscous; a narrow-transverse somewhat obUque 

 white spot from costa at J, nearly reaching fold ; plical and second 

 discal stigmata obscurely darker, approximated, edged laterally 

 with white dots ; a semicircular white spot on costa before f : cilia 

 dark grey. Hind-wings rather dark grey; cilia grey. 



Ecuador, Quevado; Dutch Guiana, Paramaribo, in 

 December; two specimens. 



Thiotricha argoxantha, n. sp. 



(J $. 7-9 mm. Head, palpi, and thorax silvery- white. Abdo- 

 men grey, anal tuft large, whitish. Fore-wings elongate, narrow, 

 costa hardly arched, apex tolerably pointed, termen obliquely 

 roimded; silvery-white, sometimes ochreous -tinged; an orange 

 praeapical patch resting on costa but not quite reaching apex, 

 termen, or dorsum, anterior edge strongly convex and reaching to 

 before J of wing, preceded by grey suffusion which is stronger and 

 darker towards costa, and indents it just below costa; sometimes 

 a short orange mark on tornus touching this ; a round black apical 

 dot : cilia whitish, tinged with orange towards termen, above apex 

 with two dark fuscous hooks, beneath apex with two indistinct 

 grey lines. Hind-wings with apex very long-produced; grey, 

 paler towards base; cilia whitish -grey, opposite apex with two 

 short dark grey lines. 



British Guiana, Bartica, Georgetown, and Mallali, 

 from December to April (Parish) ; seven specimens. 



Anterethista, n. g. 



Head smooth; ocelli absent; tongue developed. Antennae |, 

 in (J simple, basal joint elongate, without pecten. Labial palpi 

 very long, recurved, slender, second joint with scales somewhat 

 expanded towards apex above, terminal joint longer than second, 

 acute. Maxillary palpi minute, filiform, appressed. Posterior 

 tibiae with appressed hairs above. Fore-wings with 16 furcate, 

 2 from towards angle, 7 absent, 11 from |. Hind-wings 1, elongate- 

 trapezoidal, apex tolerably pointed, termen somewhat sinuate 

 beneath apex, cilia 3 ; 3 and 4 rather approximated towards base, 

 5 nearly parallel, 6 absent, 7 to apex. 



A development of Commatica. 



Anterethista heteractis, n. sp. 



cj $. 7-8 mm. Head, thorax, and abdomen dark grey, face 

 whitish. Palpi whitish, second joint streaked with dark fuscous 



