14 PROCEEDINGS OF THE NATIONAL. MUSEUM. vol.61. 



tion broad, filling the area between the closed mandibles, apex broadly 

 triangular. Antennal scapes surpassing occipital corners by two- 

 sevenths of their length, second funicular joint nearly as long as the 

 third and fourth together, third joint two and one fourth times as 

 long as broad, remaining joints decreasing in length apically, ter- 

 minal joint slender, slightly shorter than the two preceding joints 

 together. Pronotum in profile moderately convex ; from above longer 

 than broad and less than three times as long as mesonotum. Meso- 

 notum a little longer than broad. Epinotum as long as the pro and 

 mesonotum together, its base in profile rather convex above and 

 broadly rounding into the short, flat declivity. Petiolar node in pro- 

 file higher than long, slightly higher behind than in front, broadly 

 convex above and rounding into the steep, convex anterior surface 

 and more narrowly into the flat posterior surface; from above, less 

 than twice as long as broad, and evenly narrowed toward the front. 



Head, thorax and petiole nearly opaque; densely and coarsely 

 punctate and with striolae, longitudinal on the head and transverse 

 on epinotal base. Mandibles very subtilly striate and with coarse, 

 scattered punctures. Clypeus and front of head irregularly, longi- 

 tudinal striate. Gaster and legs with regular, moderately coarse, 

 shallow, separated punctures. 



Erect hairs long, fine and moderately abundant on head, body and 

 appendages; short, recumbent, silky hairs everywhere, but thickest 

 on gaster. 



Color black, mandibles, funiculi, legs and tip of gaster reddish. 



Type locality. — Honduras : Lombardia. 



Coty pes.— Cat No. 24441, U.S.N.M. 



Described from a series of eight workers. 



In the strong punctation, which on the pronotum is unusually 

 coarse, almost reticulate, the species resembles L. mexieaita Mayr, 

 which differs in its much smaller size and in the structure of the 

 mandibles, which have the apical border evenly concave instead of 

 biconcave as in liondiiriana. 



LEPTOGENYS (LOBOPELTA) RUFA. new species. 



Worker. — Length, 2'.9 mm. 



Head one-fifth longer than broad, subquadrate, nearly as broad 

 behind as in front, sides feebly convex, posterior border straight. 

 Mandibles little curved, linear to their apical border, which is very 

 short and feebly concave and separated from the basal portion by 

 an obtuse angle. Clypeus sharply carinate, triangularly produced 

 in front and not occupying the entire area between the closed mandi- 

 bles. Eyes small, situated at sides of head, at a distance from front 

 of head equal to two times their longitudinal diameter. Antennae 

 stout, arcuate, their scapes surpassing occipital corners by about one- 



