6 PROCEEDIlSrGS OF THE NATIONAL MUSEUM. vol.61. 



Hairs fine and silky, moderately abundant on head, body, and 

 appendages; antennae and legs with coarser and longer hairs. 



Color reddish brown, appendages lighter; hairs golden yellow. 



Type locality. — Honduras: Lombardia. 



Type.— C^t. No. 24434, U.S.N.M. 



Described from a single worker that was found beneath a stone 

 that sheltered also a small colony of Cerapachys (Parasyscia) hon- 

 durianus. 



Because of the curious structure of the mandibles this species can 

 not be included in the genus Alfaria, the workers of which have 

 typical trigonal mandibles. The mandibles of Opisthoscyphus ap- 

 pear to be essentially linear, though the lamellate expansion at the 

 apical half of the blades give them superficially an elongate-trigonal 

 appearance. The two genera are similar in habitus, and the latter 

 may possibly be later considered merely of subgeneric value. 



ECTATOMMA (ECTATOMMA) TUBERCULATUM (Olivier). 



Honduras : 



Found in all wooded localities. 



ESTATOMALA. (ECTATOMMA) RUIDUM Rojer. 



Generally distributed and moderately common in all localities vis- 

 ited in Honduras. 



PROCERATIUM MANCUM, new gpecies. 



Worker. — Length 2 mm. 



Head a little longer than broad, slightly narrowed in front, sides a 

 little convex; occipital corners broadly rounded, border feebly con- 

 cave ; median carinae fine, but distinct for entire length of front and 

 vertex. Mandibular blades with six short, stout teeth. Clypeus 

 between frontal carinae flat, more than twice as long as broad. 

 Frontal carinae short and thin, moderately elevated and rounded 

 posterior to middle. Antennal scapes narrowed basally and strongly 

 incrassate at apical half, extending about two-thirds the distance 

 to occipital corners, first funicular joint broader than long and a 

 little longer than the second, remaining joints, except the terminal, 

 strongly transverse, terminal joint as long as the four joints pre- 

 ceding. Eye at middle of sides of head, barely discernible. Thorax 

 broadest at humeri, which are narrowly rounded, inferior angles 

 obtusely angulate. Angle between base and declivity of epinotum 

 with a strong broadly triangular spine; declivous surface concave 

 above, flat beneath. Node in profile subquadrate, twice as high as 

 long, with nearly straight anterior and posterior surfaces and slightly 

 convex dorsum ; from above, twice as broad as long, distinctly nar- 

 rower than base of first gastric segment. Front of head rather 



