no. 1601. NEW SOUTH AMERICAN GEOMETRID MOTHS—WARREN. 109 
chocolate-brown edged by a straight, thick, deeper brown shade from 
below one-third of costa to beyond one-third of inner margin; cell 
spot vertical, silvery white, followed by the median shade which is 
angled outward on median and submedian veins, concave between ; 
outer shade close beyond, parallel to but thicker than the median, 
forked below middle, the outer branch running to anal angle; sub- 
marginal line fine, dentate-lunulate, the teeth dark on the veins, 
touching the outer shade at vein 2; a whitish tooth-shaped apical 
blotch reaching vein 6 and not touching hind margin; fringe brown 
beyond a fine dark marginal ne with white dots at the vein ends. 
Hind wing.—With basal patch of fore wing produced along inner 
margin of uniform thickness to hind margin at vein 2, including the 
silvery white cell spot, and almost obscuring the two curved shades 
answering to the median and outer shades of fore wing; submarginal 
line with the teeth black; the apical area chestnut brown. Under 
side of both wings dull brick red with dark cell spots and sub- 
marginal lines. The apex of fore wing tinged with lilac gray. 
Head, shoulders, and fore legs blackish-brown; thorax and abdo- 
men chestnut-brown; under side of abdomen and legs gray. 
Hapanse of wings.—35 mm. 
Locality.—One female from St. Jean, Maroni River, French Gui- 
ana, July, 1904. Nearest to 7. nigricosta Warren, distinguished 
from it and apicitruncaria Herrich-Schaeffer and its allies by the 
transverse shades instead of distinct lines. 
Type.—Cat. No. 11407, U.S.N.M. 
THYSANOPYGA PRUNICOLOR, new species. 
Fore wing.—Dull purplish brown, with an admixture of lilac gray 
toward base; the lines deeper brown, somewhat obscure; first curved 
close to base; second, just before middle, parallel to hind margin; 
third at two-thirds somewhat waved; submarginal blotched and very 
indistinct; an apical white blotch containing gray scales and with a 
small brown patch on its costal edge; cell spot marked by a few pale 
scales; fringe concolorous, beyond a fine dark marginal line. 
Hind wing.—W ith three brown lines, antemedian, postmedian, and 
submarginal; cell spot oval, well-defined, snow white. Under side 
dull lilac gray, speckled with dark; marginal border diffusely darker. 
Head, thorax, and abdomen dull lilac gray. 
HLapanse of wings.—30 mm. 
Locality.—Two females from Rio Janeiro, Brazil. 
Type.—Cat. No. 11408, U.S.N.M. 
The second of these examples differs somewhat from the type; the® 
lilac gray scaling is more predominant, and in consequence the brown 
lines, which seem to be thicker and more waved, are clearer than in the 
