1915.] Wheeler, Additions to the Ant-Fauna of North America. 421 
borders convex, their apical borders with five subequal teeth. Clypeus flat, entirely 
ecarinate, 14 times as long as broad, as broad behind as in front, slightly broader in 
the middle. Frontal carine strongly diverging in front, approximated and parallel 
behind. Frontal area indistinct. Antenne slender; scapes curved and slightly 
flattened at the base, scarcely enlarged at their tips, which reach to the posterior 
corners of the head. Thorax short, not longer than the head, broadest through the 
pronotum which is about 2 as broad as the head, narrowed and laterally compressed 
behind, in profile evenly arcuate above, with strong promesonotal and mesoépinotal 
sutures; base and declivity of epinotum distinct, the former slightly convex, shorter | 
than the latter, which is abruptly sloping and distinctly concave. Petiole very much 
compressed anteroposteriorly, with sharp, broadly rounded and entire superior 
border, the anterior and posterior surfaces very feebly convex. Gaster narrow, 
nearly as long as the head and thorax together, with parallel sides. Legs moderately 
long; fore femora somewhat incrassated. 
Head behind the eyes, thorax, petiole, gaster and legs shining, smooth, with very 
fine, sparse and indistinct punctures. Mandibles slightly shining, coarsely and 
rather densely striatopunctate; clypeus and anterior half of head opaque, densely 
punctate and covered with coarse, slightly elongate foveole. Front with several 
round foveole; vertex punctate. Antennal scapes slightly shining, finely punctate. 
Hairs yellowish, slender, sparse, rather short and erect on the body and upper 
and posterior portion of the head, shorter on the mandibles, very short and obtuse 
on the clypeus, and sculptured portions of the head where they arise from the elon- 
gate foveole. Legs with very short appressed hairs except at the knees where they 
are longer and erect. | 
Head, petiole, epinotum, mesonotum, gaster and scapes castaneous; pronotum, 
funiculi and legs paler and more yellowish red or testaceous. 
Worker Minor. Length: 4 mm. 
Head small, but little longer than broad, rounded behind, a little broader behind 
than in front, evenly convex above, not truncated anteriorly. Clypeus subcarinate, 
nearly as broad as long. Mandibles rather narrow. Antennal scapes reaching fully 
4 their length beyond the posterior border of the head. Thorax and petiole shaped 
much as in the worker major, but the former proportionally higher through the 
mesonotum. Gaster less elongate, elliptical. 
Mandibles finely striatopunctate, glossy; whole head smooth and shining, like 
the remainder of the body, not sculptured anteriorly. 
Hairs white, delicate, eat and rather short, not modified on the anterior por- 
tion of the head. 
Color like that of the pees major, except that the scapes as well as the funiculi 
of the antenne are colored like the legs and mandibles and the head is also testaceous 
in front and castaneous only on the vertex and occiput. 
Described from single major and minor workers taken by Mr. Percy 
Leonard from a hollow twig of manzanita near the Raja Yogi Institute on 
Point Loma, near San Diego, Cala. This species is unlike any of our other 
North American Camponoti. It clearly approaches the species of Colobopsis 
and should, perhaps, be included in that subgenus, though the peculiar 
truncated anterior portion of the head is not circular nor distinctly marginate 
as in such forms as C. truncatus Spinola, ¢mpressus Roger, abditus Forel and 
pylartes Wheeler. 
