1921] Wheeler: Tachigalia Ants 161 



than the petiole, high and convex above ; its sides with tvs^o pairs 

 of small tubercles, the anterior pair scarcely visible. Gaster and 

 legs as in ecMnatinodis. 



Mandibles shining, very finely striatopunctate. Clypeus 

 nearly smooth in the middle, shining, longitudinally rugulose on 

 the sides. Head, thorax and pedicel subopaque, the head densely 

 and finely reticulate-rugulose, the rugules longitudinal ; thorax 

 with similar sculpture, the rugules on the pronotum somewhat 

 more pronounced. Postpetiole with a few longitudinal rugae. 

 Gaster shining, the basal half of the first segment very finely 

 shagreened and punctate, so that it appears slightly opaque or 

 sublucid. 



Hairs white, abundant, short, clavate and erect on the dorsal 

 surface of the body. Such hairs are lacking, however, on the 

 appendages where they are replaced by short, appressed 

 pubesence. 



Brown ; upper surface of head, mesonotum, mesopleurse, 

 epinotum, nodes of pedicel and antennal clubs dark brown ; man- 

 dibles, clypeus, scapes and tarsi yellow; pronotum and gaster 

 brownish yellow. 



Female (dealated). Length about 3 mm. 

 Resembling the worker. Pronotum more rectangular, its 

 anterior border very straight and sharp, the comers acute. 

 Mesonotum and scutellum flat ; base of epinotum convex, bluntly 

 angled on each side anteriorly, declivity longer, abrupt and 

 concave, the spines of the worker represented by small, blunt 

 angles. Petiole and postpetiole similar to those of the worker, 

 but the tubercles on the sides of the latter longer and more acute. 

 Gaster longer. 



Sculpture much as in the worker ; mesonotum as finely and 

 regularly rugulose-punctate as the head ; scutellum densely punc- 

 tate; base of epinotum transversely rugulose-punctate. Gaster 

 very finely striolate-punctate at base of first segment. 



Pilosity like that of the worker. 



Yellowish brown ; mandibles, clypeus, tarsi and gaster yellow ; 

 ocellar region, scutellum and mesopleurse dark brown. 



