( 27 7 ) 

 225. Iridopsis pallescens spec. nov. 



Forewing : dull whitish, sprinkled with grey and blackish scales ; costa with 

 short vertical brown striae and black dashes at the commencement of the lines ; 

 lines black ; first from one-third of costa, bent in cell, then sinnons and inwardly 

 oblique to one-fonrth of inner margin ; outer line from three-fonrths of costa, 

 roundly projecting outwards on vein 5, then sinuate inwards to middle of inner 

 margin ; median shade indistinct, passing close beyond the discal spot and nearly 

 tonching outer line at inner margin ; a brown shade preceding inner line and another 

 following the outer; marginal area grey and brown with a whitish waved sub- 

 marginal line, the apical area above vein 4 slightly darker ; black marginal spots 

 between the veins ; fringe grey. 



Hindtmng : with basal two-thirds paler; median line very faint; outer line 

 finely black, angled outwards on the cell-fold, then arched to inner margin ; cell- 

 spot oval, of white raised scales ; marginal area as in forewing. 



Underside pearly white; costa of forewing striated and spotted with dark 

 fuscous ; a black cell-spot and narrow smoky fuscous blotch at apex, the extremity 

 of which remains white. 



Head, thorax, and abdomen greyish white, with some darker speckling. 



Expanse of wings : 37 mm. 



1 $ from Sapucay, Paraguay, September 1 904 (Foster). 



226. Iridopsis submarginata spec. nov. 



Indistinguishable above from /. syrniaria Guen., except in one particular : the 

 upper part of outer line is not curved obliquely outwards from costa nor forms any 

 projection between 4 and 6, but runs straight and slightly waved from costa to 

 vein 5 as in chalcia Oberth. and rectura Dogn. 



On the underside both wings have a black marginal border, narrowing before 

 middle ; the forewing with a large black cell-spot ; both wings pure satiny white. 



Expanse of wings : 48 mm. 



1 S from La Vuelta, Caura Eiver, Venezuela, May 1904 (Klages). 



227. Melanoscia arctiata spec. nov. 



Forewing : dark olive-fuscous, with the lines and numerous irregular specklings 

 buff; the veins finely and interruptedly buff: first line nearly vertical, bread, at 

 one-third, preceded by one or two fine broken marks from costa ; outer line broad, 

 from apex to two-thirds of inner margin, joined on vein 6 by a short broken streak 

 from costa at five-sixths ; a much-interrupted pale median line, plainer above vein 4 

 and forked to costa, with the inner branch broader ; base of veins 2, 3, 4 with some 

 buff speckling ; some irregular snbmarginal buff spots ; fringe dark, mottled with 

 buff at the vein-ends. 



Hindwing ; fulvous, black-speckled, with an antemedian and median band, 

 the latter followed by another less strongly marked, dull fulvous ; the marginal 

 border broadly olive fuscous ; fringe fulvous. 



Underside like npper, but all the pale spaces more strongly marked and of the 

 same tint in both wings, yellow buff. 



Head, thorax, and abdomen dark fuscous and bnff ; abdominal segments black 

 tinged with buff ; vertex wholly buff; face buff with black centre; antennae bull' 



