new Neotropical Geometiida3. 513 



form and position of the lines, however, and especially the 

 somewhat more strongly dentate termen of the hind wing, 

 point to its specific distinctness. It is not impossible that it, 

 too, may eventually prove to be the female to some known 

 " Stenalcidia." The group containing dimidiaria, Guen., 

 guisqui/iaria, Guen., elongaria, Snell.,aud others is a difficult 

 one, but I have given very careful attention to it without 

 discovering any species to which accessilinea could possibly 

 be referred. The females of several are already known and 

 have simple antennae. 



Note. — I have two <$ $ which probably belong to this 

 species; the above description would apply to them, with 

 the following differences : — 33-31; somewhat lighter, more 

 sharply maiked ; fore wing with a curved dark shade pre- 

 ceding the antemedian, meeting it on inner margin ; a tine, 

 slightly interrupted, dark median line, strongly outcurved 

 behind cell-spot, then nearly parallel with postmedian ; post- 

 median less sharply inbent on submedian fold, therefore less 

 closely approaching antem dim ; hind wing with discal spot 

 nearer to antemedian than to postmedian, whereas in the 

 type $ the reverse is the case; underside much paler, that 

 of the fore wing lighter fuscous, with inner margin whitish 

 and cell-spot distinct, that of the hind wing whitish, with 

 costa slightly infuscated and cell-spot distinct; antennal 

 pectinations rather long. 



Oconeque, S.E. Peru, 7000 feet, July 1904 (G. Ockenden) ; 

 Torne, Colombia, August 1907 ; also in coll. Dognin from 

 San Antonio. 



Perhaps nearest to the more sharply marked examples of 

 Stenalcidia elongaria (Snell.), but readdy distinguished by 

 having the postmedian line of the hind wing further from 

 the termen. 



Stenalcidia praparata, sp. n. 



$ . 32 mm. — Face fuscous above, whitish below; palpus 

 fuscous ; antennal shaft banded whitish and fuscous ; vertex 

 and occiput white ; thorax and abdomen white, marked w r ith 

 fuscous. Hind tibia much dilated, the hair-pencil strongly- 

 developed. Wings white, sparsely strigulated with brown 

 and fuscous. Fore wing with costa dark fuscous nearly to 

 antemedian line, more broadly at base; large dark fuscous 

 costal spots at the origin of the three lines, a larger blotch 

 proximally to the subtermiual, a narrow costal darkening at 

 apex, and strong costal strigulation in the interspaces ; costal 

 spot at origin of antemedian line oblique outwards, reaching 

 into cell, the line here sharply angled, becoming very oblique 



