xo. 1601. NEW SOUTH AMERICAN GEOMETRID MOTHS—WARREN. 101 
Distinguished by the neatness and clearness of the mandeinae. and 
by the absence beneath of the orange subcostal streak of fore wings. 
Type.—Cat. No. 11393, U.S.N.M. 
PTEROCYPHA PAULARIA, new species. 
Fore and hind wing.—Exactly lke Pterocypha chama Schaus from 
Paraguay, on the upper side; under side likewise greatly resembling 
chama; the cell spots large and black; followed by three dark 
parallel lines of which the outermost is dentate; marginal area of 
fore wing with a blackish submarginal costal blotch reaching vein 
4, and below simply gray, the whole hind margin grayish white, the 
“marginal line black; in the hind wing the outer line is complete 
across wing, and the submarginal band is complete but quite narrow 
except toward costa. 
Abdomen with a pair of divergent brown marks on the back of 
each segment. 
Haupanse of wings.—d2 mm. 
Locality.—One male from Sao Paulo, Brazil. 
Type.—Cat. No. 11894, U.S.N.M. 
STREPSIZUGA, new genus. 
A development of 77iphosa, from which it differs in the following 
points: The forehead is prolonged into an acute scale cone; the palpi 
are triangular, heavily scaled, procumbent; the retinaculum is very 
largely developed, hairy, bilobed, the membrane vitreous and in cer- 
tain lights highly iridescent; the frenlulum in the male has a vesic- 
ulous rounded transparent base, beyond which it is dark brown, and 
ensiform in shape, ending in an acute point, but in the basal halt 
hegulate, and near the Baes constricted and twisted. 
Type.—Strepsizuga aberrans, new species. 
STREPSIZUGA ABERRANS, new species. 
Fore wing.—Brown, the lines darker, toward base and along costa 
varied in parts with pinkish ochreous; basal line dark brown edged 
with ochreous, rising close to base on both margins and prominently 
rounded in cell; inner edge of central fascia from two-fifths of costa 
to two-fifths of inner margin, acutely angled outwards below sub- 
costal vein and less sharply on median and submedian, concave out- 
wards between the angles; the broad space between it and basal 
patch paler brown with dark cross lines angled like the inner edge 
itself; outer edge lunulate-dentate, the teeth pointing basewards, 
outcurved from costa at two-thirds to vein 2, then vertical, preceded 
by three dark brown waved lines; the inner edge is succeeded by a 
blackish shade containing the black cell spot; marginal third dark 
