1921] Wheeler: Tachigalia Ants 159 



is coarsely, loosely and longitudinally rugose, with reticulate 

 interrugal spaces. Thorax subopaque, its sides obscurely longi- 

 tudinally rugose : mesonotum and scutellum longitudinally and 

 rather regularly rugulose, the former somewhat smooth 

 anteriorly. Epinotum punctate-rugulose, the declivity regularly 

 traversely rugulose. Pilosity as in the worker. The spines of 

 the epinotum are reduced to two stout teeth, as long as their width 

 at the base. Petiole and postpetiole nearly smooth, except for 

 their tubercles, which are decidedly smaller than in the worker. 

 Gaster elongate elliptical, transversely truncated anteriorly. 

 Brownish yellow ; upper surface of head, except its posterior 

 corners, antennal clubs, scutellum, postscutellum, sometimes a 

 posteromedian spot on the mesonotum, femora, except their bases 

 and gaster, except the anterior corners of the first segment, 

 dark brown. Wings whitish hyaline, with very pale veins and 

 distinct brown pterostigma. 



Male. Length 2.2 mm. 



Head distinctly longer than broad, with distinct posterior 

 corners, the posterior orbits very near the median transverse 

 diameter. Ocelli small. Cheeks very short. Clypeus vdth 

 arcuate, projecting anterior border. Mandibles small, with 

 oblique 3- or 4-toothed apical borders. Antennae slender, 12- 

 jointed ; scapes reaching nearly to the posterior corners of the 

 head ; first funicular joint longer than broad, not broader than 

 the remaining joints, which are somewhat fusiform ; fifth joint 

 long, representing two incompletely separated joints. Thorax 

 long and slender, humeri distinctly angular; mesonotum with 

 Mayrian furrows ; epinotum low and sloping, moderately convex, 

 without distinct base and declivity. Petiole smooth and slender, 

 the node represented by a swelling in the middle, the sides with 

 feeble traces of the lateral tubercles of the worker and female; 

 postpetiole smooth, without tubercles, nearly as long as broad, 

 broader behind than in front and distinctly broader than the 

 petiole. Gaster and legs slender. 



Head and thorax finely and densely punctate; vertex and 

 mesonotum smooth and shining, as are also the pedicel, gaster 

 and appendages. 



