new Neotropical Geometridse. 515 



a right angle, vertical below SM 2 , and reaching inner margin 

 at two-thirds ; subterminal line pale, dentate, filled in with 

 fuscous spots proximally ; terminal dots rather large, black. 

 Hind wing similar, without first line ; median shade fuscous 

 brown, rather diffuse, placed proximally to the cell-spot, 

 marked with black dashes on SC and M ; postmedian less 

 strongly ang'ed on submedian fold. Underside pale ; fore 

 wing with costa dark-spotted and with a dark marginal band, 

 gradually narrowing from costa to inner niaigin, and leaving 

 the apex (to R 1 ) very narrowly pale ; hind wing with faint 

 traces of dark marginal shade at apex only ; both wings with 

 rounded grey discal spot, less clear than above and scarcely 

 pale centred. 



Sapucay, 5th November, 1904 {IV. Foster) ; one $ . 



Stenalcidia rotunda, sp. n. 



<§ . 28-30 mm.— Head, with face and palpus, thorax, legs, 

 and abdomen concolorous with wings ; face narrowly pale 

 below. Antennal pectinations moderate. Fore wing with 

 costa arched, apex somewhat rounded, termen roundly con- 

 vex, not very oblique ; whitish, thickly irrorated with dark 

 brown and fuscous ; costa dark-spotted, more broadly at 

 base ; lines fuscous, starting from thick blackish marks on 

 costa; antemedian thick, somewhat interrupted, strongly 

 bent back in middle of cell, reaching inner margin just out- 

 side the fovea, which is strongly developed and dark- 

 margined ; median shade very strongly curved round the 

 cell-spot, indistinct in lower half of wing; cell-spot rounded, 

 moderately large, black ; postmedian line only distinct 

 through dark dashes on the veins, from two-thirds costa, 

 oblique outwards to R 1 , parallel with termen to R 3 , strongly 

 oblique inwards to submedian fold, there strongly angled, 

 more weakly angled on SM 2 , reaching inner margin at 

 slightly beyond one-half ; subterminal line whitish, dentate, 

 filled in with fuscous and with black dashes between the 

 veins ; terminal spots black, connected with black dashes 

 running inwards towards the subterminal ; fringe con- 

 colorous with wing, slightly mottled. Hind wing with a 

 straight diffuse antemedian shade ; cell-spot, postmedian (at 

 little beyond one-half), subterminal and terminal as in fore 

 wing. Underside much paler, the fore wing pale greyish, 

 slightly darker distally, the costa dark spotted ; hind wing 

 nearly white, very weakly dusted ; both wings with large 

 cell-spot and small terminal spots between the veins. 



Sapucay ( W. Foster) in Coll. L. B. Prout, one <$ (type) ; 

 and Coll. Brit, Mus., one <J > 4th October, 1903. 



