348 Sir G. F. Hampson on new 



streak iu discal fold from middle of cell to termen, the 

 terminal area witli black streaks above veins 6 and 4. Hind 

 wino^ white, the margins and inner area black. 



Hab. Br. Guiana {Rodway), 1 c? type. Exp. 26 mm. 



Genus GonotrepheSj nov. 

 Type, Thyrarctia friga, Druce. 



Proboscis aborted, minute ; palpi obliquely upturned, tlie 

 second joint reaching about to middle of frons and moderately 

 fringed with hair, the third short ; frons smooth ; antennse 

 of male bipectinate with moderate branches to apex ; tegulse 

 dorsally produced to form a hood ; tibiae fringed with long 

 hair ; abdomen clothed with rough hair on dorsum, the anal 

 segment with long lateral tufts of hair. Fore wing with the 

 apex rather produced and acute, the termen angled at vein 5, 

 then obliquely curved ; vein 3 from well before angle of cell ; 

 5 from well above angle; 6 from upper angle ; 7,8,9, 10 

 stalked; 11 from cell. Hind wing with vein 4 absent ; 5 

 from well above angle of cell ; 6, 7 coincident. 



1073 c. Eucereon metaloba, sp. n. 



Hind wing of male with the tornal area strongly lobed, 

 but without fold and fringe of scales, the basal half of costa 

 slightly lobed. 



(^ . Head and thorax fuscous brown mixed with grey ; 

 neck with yellow ring ; palpi white at base ; fore coxae, the 

 femora and bands at extremity of fore tibiae, and the first 

 joints of tarsi whitish ; abdomen fuscous brown with yellow 

 lateral spots at extremity, the ventral surface white. Fore 

 wing grey-white, the veins, discal and submedian folds with 

 brown streaks ; an indistinct somewhat dentate antemedial 

 line; a black medial line, oblique to submedian fold, then 

 angled inwards; a small black annulus ia middle of cell; 

 a diffused brown discoidal patch extendiug to costa with a 

 pale curved line on the discocellulars ; a slight postmedial 

 white streak on costa; postmedial line blackish, rather 

 diffused and dentate to vein 5, then double and minutely 

 creuulate, bent inwards belowveiu3; some irregular dark 

 subterminal marks from apex to vein 3 and above tornus. 

 Hind wing semihyaliue greyish suftused with fuscous, the 

 costal area whitish except at apex ; the underside grey, with 

 dark discoidal bar, the termen suffused with brown from 

 apex to submedian fold. 



Hah. Peru, La Oroya [Ockenden], 1 J type. Exp. 

 30 mm. 



