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



Type-locality. — Honduras: Ceiba, San Juan Pueblo. 



C oty pes. —C^ii. No. 24457, U.S.N.M. 



Several small colonies were found in rotten logs. 



This species approaches S. fiisca Emery but is much smaller, the 

 head is more narrowed in front and the occipital incision narrower; 

 the clypeus is much longer. The straight mandibles are longer than 

 in loummiiae Roger and its varieties, from which emenji differs 

 also in lacking the very short, yquamiform hairs on the head. 



STRUMIGENYS CORDOVENSIS Mayr. 



Honduras: Ceiba. 



One large colony of this beautiful species was found nesting in 

 rotten wood. 



STRUMIGENYS BREVICORNIS, new species. 



Worker. — Length 1.50 mm. 



Head elongate, narrowly concave at middle of posterior border; 

 sides convex posterior to eyes, very slightly convex and subparallel 

 in front of eyes. Mandibles less than half as long as head, rather 

 slender and tapering, outer border shallowly concave in front of 

 middle, inner border edentate basally. a small though distinct tooth 

 in front of middle and several very fine, separated denticulae be- 

 tween this and the tips. Clypeus slightly broader than long, rounded 

 at anterior border. Antennal scapes less than half as long as liead, 

 the upper border very shallowly concave, the inner border roundly 

 expanded at middle; first funicular joint as long as the second and 

 third together, third joint a little shortei' than the first; terminal 

 joint slightly longer than the remainder of funiculus. Pronotum 

 nearly flat, margined in front, humeri rounded. Epinotal spines 

 triangular, their width at base nearly as great as their length and 

 their length a little shorter than their distance apart at base. 

 Petiolar node from above broader than long, very slightly broader 

 behind than in front, with feebly convex sides and nearly straight 

 anterior border; in profile a little shorter than the pedicel, rounded 

 above and sloping in front. Postpetiole about twice as broad as 

 petiole, excised at middle of posterior half. 



Head, thorax, petiole and postpetiole coarsely cribrate-punctate and 

 nearly opaque. Caster shining and smooth except for short basal 

 striae. Erect hairs elongate-clavate, sparse on head, thorax and 

 abdomen; rurved, flattened hairs on elypeal margin. bor<ler of anten- 

 nal scapes and tibiae and tarei. Ventral and posterior margins of 

 postpetiole with moderately well-developed spongiform hairs. 



Pale reddish brown, gaster, except base, dark brown to black. 



Female (dealated). Length 1.90 mm. 



Epinotal spines broader, petiole node kss elevated and sloping 

 more "-raduallv in front and color darker than in the worker. 



