( 501 ) 



Hvmhmng : purplish black, semidiaphauous except towards apex, which is more 

 densely scaled. 



Underside like upper, but the orange area somewhat broader. 



Head, thorax, abdomen above and beneath, and legs purplish black, the 

 purplish tints especially strong on the abdomen. 



Expanse of wings : 50 mm. 



1 ? from Limbani, Carabaya, S.E. Peru, 10,000 ft., November 1901, wet 

 season (Ockenden). 



IT. Darna praelata spec. uov. 



Close to Darna wlitans Warr., with which it agrees in coloration ; it differs as 

 follows : the yellow blotch of forewing is ditTereutly shaped towards the hindmargin ; 

 in volitans the outer edge runs straight from costa to near the end of vein 2, above 

 which it is bluntly angled and runs inwards, forming a wedge-shaped ending to 

 the yellow blotch ; in praelata the outer edge starts from costa nearer the apex, 

 running to near the end of vein 4, where it is rectangularly lient to above the 

 end of vein 2 close to hindmargin, whence it forms a long convexity, not reaching 

 median vein, to vein 1 near base, reaching inner margin at base ; the yellow 

 area therefore has a roundly quadrate termination close to margin, instead of 

 a wedge-shaped narrow one some distance before it. Secondly, instead of the 

 pink scales with brown-scaled centre lying in the costal area of hindwing of 

 volitans, the central bed in praelata is of black scales surrounded by mealy 

 ochreons ones. 



Expanse of wings : 44 mm. 



1 S from Upper River Toro, La Merced, Pern, 3000 m., August — September 

 1901 (Simons). 



18. Stenoplastis albifrons spec. nov. 



Forewing : black, with the veins towards base white or sulphur-yellow, 

 becoming deep yellow beyond middle ; a diffuse blotch of white scales beyond cell ; 

 veins 7, 8, forming a tridentate yellow spot ; fringe black. 



Hindwing : white, with the hindmargin from before apex to anal angle broadly 

 black ; the costal and abdominal margins narrowly black. 



Underside of forewing with the base of costal vein white ; an elongate white 

 blotch from base along submedian interspace half as long as wing ; a large white 

 blotch before ajiex extending from costal vein to vein 3 ; hindwing as above, but the 

 hindmarginal border narrower, the costa white. 



Palpi white above and below, black on each side, the basal joint j'ellow ; face 

 pure white ; vertex, collar, thorax, and abdomen black ; vertex and'collar each with 

 a white middle spot, thorax and abdomen with a white line down the middle ; 

 patagia black with inner edge white ; shoulders with a large yellow lateral spot, 

 one behind each eye ; the pectus yellow ; abdomen beneath white, with a yellow 

 lateral stripe ; legs black and white. 



Expanse of wings : 34 mm. 



2 ^S from Yuugas, 'Bolivia, 1200 m., November 1901, end of dry season 

 (Simons). 



Differs from S. cingulina Druce in having only the white spot at end of cell 

 of forewings, and by the white face. 



