1926] 
Some New N eotropical Ants 
103 
Head and thorax subopaque, finely and densely reticulo- 
striolate, the striae transverse on posterior part of head, median 
portion of pronotum and on the meso-and epinotum; petiole 
with more subtle striation and gaster shining, with fine separated 
punctures. Mandibles sparsely and coarsely punctured and very 
finely striolate. 
Fine, erect hairs rather sparse on head, body and legs; ap- 
pressed yellow pilosity rather thin on head, thorax and abdomen. 
Color ferrugineous. 
Type locality. — Comondu, Baja California. 
Cotypes. — Cat. No. 29048 U. S. N. M. 
Described from 36 workers collected by the writer from 
colonies found beneath stones by the stream that waters the 
valley at Comondu. In size, structure of the head and mandibles 
and in sculpture and pilosity and coloration, Leptogenys penin- 
sularis is widely different from any of the described neotropical 
species. 
Erebomyrma nevermanni, new species. 
Worker. — Length 1.25 mm. 
Head, excluding mandibles, a little longer than broad and 
about as broad in front as behind, with evenly arcuate sides, 
rounded occipital corners and very feebly concave border. Man- 
dibular blades with four rather strong teeth. Median portion of 
clypeus convex, bordered at sides by narrow carinse terminating 
at sides as triangular teeth, feebly emarginate at anterior border. 
Frontal carinse delicate, continued to rear occipital border. An- 
tennal scape extending slightly more than two-thirds the distance 
to occipital corners, slenderly clavate, first funicular joint stout, 
about as long as the three following together, joints 2-8 small, 
strongly transverse, club nearly as long as the remainder of 
funiculus, with the penultimate joint less than half as long as the 
terminal. Eyes minute, situated a little in front of middle of 
sides of head. Thorax robust. Pro-mesonotum feebly convex 
above, humeri subangulate, anterior border with a narrow elevat- 
ed margin, sides feebly arcuate and converging to the posterior 
border which is a little more than half as broad as the anterior. 
