Revision of the American Notodontidiv. 305 



and indistinct; a fine brown streak at the end of the cell, and 

 starting from its lower end a large seniilunate velvety-brown mark, 

 not extending above vein 4 ; a fine median dark grey angular line ; 

 three outer lines, wavy, and partly confluent, forming a darker 

 space between the costa and the seniilunate mark \ a subterminal 

 wavy white shade ; an interrupted terminal brown line. Secondaries 

 entirely white. 

 Expanse 33 m.m. 



Hob. Castro, Parana. 



Hetcrocamjpa aroensis, sp. no v. 



Head and thorax light reddish-brown ; the patague powdered with 

 white in the 9 • Abdomen light brown with a dark dorsal tuft at 

 the base. Primaries in the ^ grey shaded with yellowish on the 

 inner and outer margins, below the median vein, and irregularly 

 between the veins on the outer portion of the wing ; the veins 

 partly streaked with black, also fine black streaks between veins 2 

 and 3, 4 and 5, and 5 and 6 ; a few fine black streaks at the base of 

 the wing ; the inner line lunular ; a median wavy line interrupted 

 towards the costa ; the outer line replaced by some irregular black 

 scales ; a greyish shade beyond the cell ; a subapical wavy grey 

 shade. Secondaries white with the costa grey, and the inner margin 

 clothed with grey hairs. £ with the primaries more silvery -grey ; 

 no distinct transverse lines ; the veins only black at their extrem- 

 ities ; the intervenal lines heavier ; the subterminal brown shade 

 more pronounced and confluent with the streak between veins 2 and 

 3 ; a terminal fine brown line ; the base of the fringe black. 

 Secondaries duller white, the margins greyish-brown. 



Expanse £ 38 m.m. ; <J> 46 m.m. 



Hah. Aroa, Venezuela. 



Heterocampa isidra, sp. no v. 



Head and thorax mottled black and white scales. Abdomen grey. 

 Primaries white thinly speckled with black and orange scales ; an 

 oblique wavy dark line from costa near base to inner margin near 

 centre ; traces of an outer, geminate, orange line from the costa to 

 anal angle ; a faint dark median shade ; a subterminal dark shade, 

 absent below vein 2 and between veins 3 and 4 ; a terminal blackish 

 shade, and a more distinct terminal line interrupted by the veins ; 

 fringe mottled white and black ; a small black crescent at end of 

 cell. Secondaries white thickly speckled with black scales, leaving 



TRANS. ENT. SOC. LOND. 1901.— PART III. (SEPT.) 21 



