( 105 ) 



Underside wholly white ; the costal edge of forewiug grey. 



Thorax and abdomen white ; face and vertex dark brown. 



Expanse of wings : 44 mm. 



5 cJc? from San Ernesto, Bolivia, lOiiU m., Angiist, Seiitember 1900, (Simons). 



2H(). Perigramma semipleta spec. nov. 



Forftriiiff : white ; the costa narrowly, the inner margin below submedian vein, 

 the hindmargin, and a bar straight from three-fifths of costa to anal angle dark 

 grey ; the apex more broadly grey ; fringe grey ; the median veins dark grey. 



Jliiu/iriiKj : with costa and hindmargin grey ; the inner margin narrowly and 

 the space between veins 3 and 4 dnll grey ; fringe whitish ; all the veins grey. 



Underside similar ; but in the forewing the costa is broadly grey from base 

 to bar, and in the hindwing only the costa and hindmargin are grey. 



Face and vertex brownish fuseons ; thorax and abdomen white ; tips of patagia 

 and anal segments of abdomen slightly grey-tinged. 



Expanse of wings : 44 mm. 



1 S from San Ernesto, Bolivia, lOOO m., August, September lOOD (Simons). 



In P. nermria Gnen. the space between veins 3 and 4 on the forewings is filled 

 up with grey, and the wings have no bar. 



Zeuctostyla gen. nov. 



Forewing: elongate ; costa straight, convex only towards apex, which is 

 rounded ; hindmargin obliquely curved. 



Hindiving : with both angles and hindmargin rounded. 



Antennae of c? bipectinate ; palpi upcurved, hairy beneath, third segment 

 hidden ; tongue and frenulum present ; legs slender ; hindtibiae somewhat thickened, 

 with four spurs and a pencil of hairs. 



Forewing with a fovea at base and a short bar above it. 



Nenration : forewing, cell two-thirds of wing ; discocellular obliiiuely concave; 

 first median nervule from before one-half; second at three-fourths; radials long- 

 stalked together, from upper end of cell, the subcostal strongly depressed towards 

 its extremity ; 7, 8, 9 stalked from the bend, 7 strongly bent downwards towards 

 margin ; lu, 11 coincident, anastomosing with stalk of 7, 8, 9. Hindwing, cell abont 

 half as long as wing; discocellular oblique ; 6, 7 stalked ; no true radial. 



Type : Zeuctostyla ruhricoUis, spec. nov. 



231. Zeuctostyla rubricollis spec. nov. 



Forewing: hyaline bluish; costal, inner, and hindmargins black, (he last 

 more broadly, especially at apex ; the median vein and its three branches thickly 

 black, the two folds more narrowly ; an oblique black bar over the discocellular ; 

 the stalk off) and 6 thickly black to the fork, then finer ; snbmarginal area above 

 vein 4 white. 



Hindwing : the same ; the inner margin very narrowly black ; subcostal vein 

 and branches black ; discocellular narrowly black ; no white area. 



Underside similar. 



Head, thorax, and abdomen black ; basal joint of palpi, pectus, collar, and 

 shoulders orange-red. 



Expanse of wings : 33 mm. 



