( 4(iO ) 



scales; two curved chestnut and ferruginous outer lines, from costa at two-thirds 

 and three-fonrths, both interrupted opposite the cell, the outer one with silvery 

 scales along its centre : a dark brown triangular dond on inner margin from centre 

 to outer line, containing ferruginous scales intermixed : fringe fawn-colour. 



Hindwings : more ferrngiuons ; traces of a dark diffuse antemedian shade 

 with metallic scales on it ; a diffuse brown cell-mark ; a curved diffuse ferruginous 

 postmedian line; a well-marked chestnut submargiaal line, edged externally with 

 silvery scales : followed by a row of four metallic dashes ; fringe fawn-colonr, 

 tinged with ferruginous, and with a pale lustrous line along base. 



Underside whitish, tinged with rufous, with a broad snbmarginal orange- 

 ferruginous shade, most prominent in forewings. Face and ))alpi ferruginous ; 

 lower part of face with silvery blue scales : vertex, thorax, and abdomen pale grey, 

 the last tinged with rufous. 



Expanse of wings : 39 mm. 



Two ? ? from between R. Songo and R. Suapi, Bolivia, March to June 1896 

 (Garlepp). 



Allied to .1. jjrospectata Snell., an example of which was also received from 

 the same locality. 



133. Argyrotome tenebrosa sp. nov. 



Forewings: dark iron-grey, the basal half thickly sprinkled with metallic 

 scales, the costal area dull ; ocelloid mark on discoceliular with <lull yellow 

 irregularly rounded orbit and metallic embossed pupil : a curved broad dark tawny 

 shade from below two-thirds of costa to anal angle, with a metallic line along its 

 centre, and darker scales internally from veins 2 to 4; an obscure dark grey shade 

 from inner margin at two-thirds, curved above to the ocelloid spot ; fringe glossy, 

 concolorous. 



Hindwings : with basal half hairy and sj)rinkled with metallic scales; a slightly 

 curved dark tawny snbmarginal line, edged externally with silvery scales, followed 

 by a dull olive-ochreous marginal space, containing four oval or rounded embossed 

 metallic spots; basal line of fringe lustrous. 



Underside bluish grey, with dark grey snbmarginal shade. Face and ])alpi 

 dark ferruginous; lower part of face silvery bine. Vertex, thorax, and abdomen 

 dark grey. 



Expanse of wings : 34 mm. 



Two 66 from between R. Songo and H. Suapi, Bolivia, March to June 1896 

 (Garlepp). 



Molybdogompha gen. nov. 



Foreicingx : with costa slightly curved : ajiex produced, but blunt : hiudmargin 

 oblique and faintly curved. 



lliiKhiings : with apex and hindmargin well rounded, anal angle sqnare; a 

 large puckered fovea beneath at base in the 6: the frenulum well develojied, and 

 the costa slightly shouldered at base. 



Palpi short, suberect : tongne developed ; antennae of i well pectinated, of 

 ? simple. 



Neuration: forewings, cell half as long as wing : fust median at tliree-fourths, 

 second at seven-eighths, third from end of cell; the Iwn radials close together from 



