1885.] A. Forel — Indian Ants of the Indian Museum, Calcutta. 181 



tures and with two black teetli at the end of the terminal edge. Clypeus 

 very short, very deeply and broadly emarginate at the middle of its 

 anterior edge, as smooth in its middle part even as the frontal area, longi- 

 tudinally striated at the sides. Antennal fossee very near to the anterior 

 edge of the head. Frontal edges as long as the scapi. At their exterior 

 side is a smooth and shining groove in which the scapus is lodged. The 

 anterior half of the head is longitudinally striated ; the posterior is 

 smooth, shining, with some scattered puncture, with a hair in each point. 



Thorax very short. The pronotum is broadened and forms at each 

 side an edged and rounded protuberance. The pronotum and the meso- 

 notum form together only one convex, smooth, and shining hump, with- 

 out transverse impression. The meso-metanotal groove is very distinct. 

 Metanotum low ; its basal surface with two minute longitudinal edges 

 at the sides, which terminate each in a triangular tooth (instead of the 

 spines). The basal surface of the metanotum delicately transversely 

 reticulate, the declivous one delicately transversely reticulate-rugose. 



The nodes of the petiole have the usual form. They are narrow 

 and microscopically reticulate. Abdomen smooth and shining with large 

 golden concave points on its first segment. The whole body, inclusive 

 of the tibise and of scapi, covered with erect hairs. 



Yellow. The anterior edge of the clypeus and the anterior half 

 of the mandibles darkened ; the terminal edge of the mandibles blackish. 



^ . Length : 1.5 millim. Stature relatively short and thickset. 

 Head oval, not emarginate. Antennae like those of the soldier. The 

 scapi reach the posterior edge of the head. Mandibles smooth, shining, 

 with scattered puncture and eight teeth. Clypeus entire, smooth and 

 shining like the whole head. Eyes very minute, situated on the anterior 

 third of the head, and each compounded of about 12 facets. No groove 

 for the scapi. Thorax as in the soldier, but the metanotum is less 

 low. Metanotum with two minute teeth, extremely finely and trans- 

 versely wrinkled between these teeth. Nodes of the petiole microscopi- 

 cally reticulate. A very large brownish and gilt puncture on the 

 abdomen. This puncture is more abundant than that of the soldier, and 

 even more abundant than in Tetramoriuini auropunctatuni. The erect 

 hairs of the body are a little more scattered and those on the tibiae and 

 scapi more oblique than in the soldier. 



Entirely yellow, with the terminal edge of the mandibles darkened 

 and the puncture of the abdomen brownish (and gilt). 

 Genus Pheidologeton. 

 Mayr, Myrmecol. Studien, 1862. 



23. Pheidologeton laboriosus, Smith (Proc.L: S. Zool. 1861, Sole- 

 no^sis) , 5 major. 



