1934 ] 
Three New North American Ants 
191 
backwards between the teeth. This sulcus is bordered at 
either side by a ridge which extends forward from the base 
of each tooth. 
Node of the petiole in profile with a straight, sharply 
sloping anterior face which meets the anterior peduncle at 
a wide but well-marked angle. Summit of the node blunt, 
the posterior face slightly convex and steeply descending to 
the very short posterior peduncle. There is no ventral tooth 
on the anterior peduncle but a narrow lamella runs almost 
its entire length. Postpetiole in profile notably larger than 
the node of the petiole, its dorsum consisting of a long, slop- 
ing anterior face, a rounded summit and a shorter and more 
declivious posterior face. The ventral face of the post- 
petiole is straight or feebly sinuate. Seen from above the 
node of the petiole is subcircular, about twice as wide as the 
anterior peduncle and a little more than half as wide as the 
pyriform postpetiole. 
Gaster rather small, oval. 
Mandibles moderately shining, covered with fine and 
somewhat irregular longitudinal striae. Entire head, except 
for the frontal area and the antennal fossae, feebly shining 
or dull, coarsely reticulo-rugose with the interrugal spaces 
finely granulose. Just above the insertion of the mandibles 
and on the clypeus the granulation is more feeble than else- 
where. In some specimens the median lobe of the clypeus 
lacks the granulation altogether. Antennal scapes finely 
and densely punctate. Thorax densely and rather more 
coarsely granulose than the head. In certain lights feeble 
rugae may be seen on the thorax, especially on the epinotum 
where they are most prominent. None of them, however, 
are nearly as well developed as those on the head. Petiolar 
nodes finely granulose. Abdomen glabrous with exceeding- 
ly fine, piligerous punctures. 
Hairs moderately numerous, rather short, coarse, golden, 
erect and somewhat obtuse. About equally numerous on all 
parts of the body. Femora with short, rather sparse, erect 
hairs : those on the tibiae and tarsi more numerous, finer and 
