South American Micro-Lepidoptera. 245 



towards angle, 7 and 8 stalked, 7 to costa, 11 from middle. Hind- 

 wings 1, elongate-trapezoidal, apex obtuse-pointed, termen hardly 

 sinuate, cilia over 1 ; a fringe of long hairs from lower margin of cell 

 towards base; 3 and 4 connate, 5 nearly parallel, 6 and 7 closely 

 approximated towards base. 



A development of Battaristis. 



Ethirostoma semiacma, n. sp. 



cJ $. 8-10 mm. Head and thorax in (J grey-whitish, in ? grey, 

 face more or less whitish-suffused, shoulders marked with dark 

 fuscous. Palpi white, more or less distinctly barred with grey. 

 Abdomen in ^ grey, in $ dark grey. Fore-wings elongate, narrow, 

 costa gently arched, apex obtuse, termen obliquely rounded; 

 purplish-fuscous, more or less suffusedly irrorated with white; a 

 dark fuscous erect mark from base of dorsum; an irregular dark 

 fuscous spot beneath costa at i; a dark fuscous transverse streak 

 from dorsum at J, reachuig half across wing, posteriorly edged with 

 white ; a thick black streak along costa from before middle to near 

 apex, cut by two very oblique white strigulae from beyond middle 

 and at | ; stigmata dark fuscous, plical obliquely before first discal, 

 followed by a raised white spot, first discal indistinct, second en- 

 larged into an irregular spot followed by a whitish tuft ; an irregular 

 elongate ochreous -white apical blotch, from anterior extremity of 

 which a faint dentate whitish line runs to tornus; a leaden-grey 

 spot adjoining apical blotch beneath : cilia dark fuscous irrorated 

 with white points, beneath apex with a white spot, on costa with a 

 fine white subbasal line. Hmd-wings in cJ grey, in ? dark grey, 

 thinly scaled towards base ; cilia in (J pale grey, in $ grey. 



British Guiana, Bartica and Mallali, from January to 

 March (Parish) ; eighteen specimens. 



Battaristis, n. g. 



Head smooth; ocelli present; tongue developed. Antennae 4, 

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

 very long, recurved, thickened with appressed scales, anterior edge 

 hardly roughened, second joint with scales somewhat expanded at 

 apex above, terminal joint as long as second, pointed. Maxillary 

 palpi very short, filiform, appressed to tongue. Posterior tibiae 

 clothed with hairs above. Fore-wings with 16 furcate, 2 from f-g, 

 6 sometimes to apex, 7 and 8 stalked, 7 to costa, 11 from middle. 

 Hind-wuags 1, elongate-trapezoidal, apex obtuse, termen faintly 

 sinuate, cilia 1 ; 3 and 4 connate, 5 somewhat approximated, 6 and 



TRANS. ENT. SOC. LOND. 1914. — PART II. (OCT.) R 



