MANN: THE ANTS OF BRAZIL. 437 
88. Pheidole (Pheidole) fallax subsp. jelksii Mayr. 
Found at Abunda, Bolivia, and at Porto Velho, Brazil. 
89. Pheidole (Pheidole) fallax subsp. jelskit var. antillensis Forel. 
Several workers and soldiers from Pardé and Abunda, Bolivia agree 
closely with West Indian specimens before me. 
90. Pheidole (Pheidole) impressa Mayr. 
Two soldiers of this curiously colored species were taken at Baixa 
Verde. Since the types were described from Baturité in Ceara, the 
species has not been recorded. My soldiers differ a little in color 
from those described by Mayr, but otherwise agree closely with his 
description. The head is ferruginous instead of ochre-yellow and 
the gaster black. It may be that the Baixa Verde specimens repre- 
sent an undescribed color variety, but I think it more probable that 
those before Mayr were more immature and the color not fully devel- 
oped. 
91. Pheidole (Pheidole) wallacei, sp. nov. 
Soldier. Length 6 mm. 
Head, excluding mandibles, longer than broad, narrowed behind; 
sides slightly convex; occipital corners narrowly rounded, the border 
with a shallow, narrow incision. Mandibles large and stout, the 
apical tooth long; blade with a short, stout subapical tooth and 
several very small teeth. Clypeus depressed; anterior border dis- 
tinctly concave at middle. Frontal carinae strong and thin at base, 
extending only slightly past the antennal pits. Frontal area strongly 
depressed. Antennal scapes slender, extending almost to occipital 
corners, moderately bent at base; funiculus long and very slender, 
the first joint somewhat swollen, joints 2-8 cylindrical, three times as 
long as broad; club very slender, a little more than half as long as the 
rest of funiculus, the joints about four times as long as broad, apical 
joint a little longer than the penultimate. Eyes small, convex, located 
at anterior third of head. Pronotum in profile evenly rounded; the 
sides slightly drawn out and rounded a little posterior to the middle. 
Mesonotum in profile angulate at middle, the anterior part flat, the 
posterior declivous. Base of epinotum much longer than the declivity, 
