194 Mr. E. Meyrick on 
dark fuscous blotch beneath disc before middle, darker and more 
sharply marked in 3; an indistinct suffused dark fuscous spot in 
disc at $3, and sometimes a smaller one between this and termen : 
cilia brownish, sometimes obscurely barred with darker. Hindwings 
and cilia fuscous. 
Brazit, Entre Rios, Sao Paulo; Paraacuay, Sapucay ; 
ARGENTINA, Parana, Tucuman; from December to 
February; sixteen specimens. 
Acrolophus tricausta, n. sp. 
3. 20-23 mm. Head, palpi, and thorax greyish-ochreous or light 
fuscous sprinkled with darker; palpi extremely long, strongly re- 
curved, extending to extremity of thorax, thickened with dense 
slightly rough scales. Antennae strongly flat-dentate. Abdomen 
fuscous, uncus slender, diverging towards apex, curved, claspers 
long, narrow, with rounded apex, on middle of lower margin with 
a strong acute tooth having a prominence on its inner edge, 
penis obtuse-pointed. Posterior tarsi not rough-scaled. Forewings 
elongate, moderate, costa moderately arched, apex rounded, termen 
rounded, somewhat oblique; all veins separate; brownish-ochreous 
or brownish, more or less strigulated with dark fuscous, especially 
on costa; an oblique-transverse mark towards dorsum at }, a tri- 
angular submedian blotch before middle, and a spot in disc at # 
blackish-fuscous: cilia brownish-ochreous. Hindwings and cilia 
fuscous. 
ARGENTINA, Parana; seven specimens. 
Acrolophus spinifera, n. sp. 
3g. 27 mm. Head, palpi, and thorax fuscous; palpi extremely 
long, strongly recurved, reaching to end of thorax, thickened with 
dense scales roughly projecting anteriorly throughout. Antennae 
flat-dentate. Abdomen fuscous, uncus moderately long, curved, 
branches nearly approximated but not touching each other, claspers 
narrow, uniform, at apex rounded beneath but with upper angle 
terminating in a long fine projecting spine. Posterior tarsi not 
rough-scaled. Forewings elongate, posteriorly dilated, costa gently 
arched, apex rounded, termen rounded, somewhat oblique; all veins 
separate; brown, with some scattered dark fuscous strigulae, costa 
spotted and strigulated with darker fuscous; a semioval dark fuscous 
blotch extending beneath disc from 4 to beyond middle, where it 
coalesces with a rather dark brown oblique blotch extending from 
disc at 2 towards tornus but gradually becoming obsolete, its upper 
angle dark fuscous and followed by two or three ochreous-whitish 
