( 96 ) 



rest of abdomen varied with brown-black, the antepenultimate dorsal segment 

 generally white ; underside and legs whitish ; forelegs fuscous black in front. 



The ? is wholly without the black fascia and anal spot of hindwing; instead 

 the subapical blotch of forewing is repeated on the hindwing, with traces of a 

 submarginal brown line, especially on submedian fold ; and the dorsal segments 

 of abdomen are less suffused with brown. 



Expanse of wings : t? 3a mm. ; ? 28 mm. 



10 c?c?, 2 ? ?, from Fonte Boa, Upper Amazons, May — September 1900 

 (Klages), type; and 1 c? from British Guiana bought at Georgetown. 



This species shows a departure from the typical ornamentation of the genus. 



TI. Gyostega indentata spec. nov. 



Resembles the type species, G. Jloccosa Warr., but the forewing is narrower, 

 with the outer margin perceptibly indented at vein 4 ; the coloration more uniformly 

 brownish, without distinct purplish and white scaling, very much resembling, iu 

 fact, the forewing of G. simplex Warr. {Berberodcs). 



Ilindwiiuj : whiter, with only sparse fuscous speckling ; the ^lale hairs in 

 the furrow are covered with a tuft of pale brown liairs only, and the black tuft at 

 middle of wing as well as the black scaling along vein 1 are wanting. 



Underside dull cream-colour, with broad purj)lish brown marginal border. 



Head brownish ; shoulders white ; patagia, thorax, and abdomen grey. 



Expanse of wings : 27 mm. 



2 cJc? from Fonte Boa, Upper Amazons, May — September lUOO (Klages). 



72. Gyostega longicomata spec. nov. 



ForctriiKj : olive-browuish, striated with fuscous ; costa yellow, with some 

 dark scaling ; below it in cell at base a white triangular mark and another 

 beyond middle before the obscurely waved brown outer line, which is followed 

 by some milk-white scaling to apex ; some blackish spots before margin between 

 veins ; cell-spot large, blackish. 



Hindwing : whitish : below the middle covered with brown striae, which also 

 form an inner, a median, and an outer more curved brown shade ; submarginal area 

 milk-white, with purplish grey striae ; the costal area as far as median vein 

 white, containing a long black pencil of hairs from base of cell lying along 

 the subcostal vein as far as the forking of and 7. 



Underside cream-coloured, with purplish grey marginal border and a dark 

 cell-spot on forewing. 



Head brown ; shoulders and patagia white ; abdomen grey, varied with wliitish ; 

 the segmental rings white. 



Expanse of wings : 20 mm. 



1 <? from Fonte Boa, Upper Amazons, May I'JUO (Klages). 



This and the following species, tricristata, will form distinct sections of tlic 

 genus. 



73. Gyostega tricristata sjicc. nov. 



Forewiny : with apex acute and outer margin straight ; inner margin lobud. 

 llufous brown ; the costa yellow, with some fuscous shining scales ; base whitish, 

 fuscous-speckled ; an obscurely darker median and submarginal band, the former 



