1921] Wheeler: Tachigalia Ants 145 



in some the fore legs are brownish yellow throughout. There 

 is also considerable variation in the coloration of the petiole, 

 postpetiole and gaster. In some specimens the petiole is entirely 

 castaneous and only the node of the postpetiole is yellowish 

 brown, or the yellowish brown at the bases of the gastric seg- 

 ments may be much reduced. The whole epinotum may also be 

 castaneous in dark individuals. 



Female. Length : 7.5-8.5 mm. 



Head one and one fourth times as long as broad, subrectan- 

 gular, slightly narrower in front than behind, with rather 

 straight sides and feebly and broadly excised posterior border. 

 Eyes and ocelli larger and more convex than in the worker. 

 Mandibles short, with the external borders, abruptly geniculate 

 at the base, the upper surface flattened, their apical borders with 

 two sharp terminal and no basal teeth. Epinotum rounded, but 

 with distinct, subequal base and declivity. Petiole one and two- 

 third times as long as broad, the node somewhat depressed above, 

 its sides rather bluntly submarginate, its ventral tooth large; 

 postpetiole nearly as long as broad, less than twice as broad as 

 the petiole. Gaster elongate. Wings narrow and short (6 mm.) . 



Sculpture much as in the worker, but mandibles striatopunc- 

 tate and anterior portion of head more opaque and more densely 

 punctate. 



Pilosity and pubescence as in the worker. 



Black ; mandibles castaneous red ; antennae brownish yellow ; 

 the scapes sometimes slightly infuscated in the middle; clypeus, 

 gula, pronotum and sutures of the thorax more or less castane- 

 ous ; lateral borders of the ventral and dorsal sclerites of the 

 gaster, tarsi and tibiae brownish yellow ; the middle and hind tibiae 

 infuscated in the middle of their extensor surfaces ; femora black- 

 ish, with brownish tips and bases. Wings grayish hyaline, iri- 

 descent, not infuscated, with very distinct blackish veins and 

 pterostigma. 



Male. Length : 7.4-7.6 mm. 



Head through the eyes as long as broad, eyes and ocelli 

 larger than in damyiosa; antennal scapes and first funicular 

 joint, decidedly longer. Clypeus strongly carinate, slightly pro- 



