MEXICAN FORMICID^. 885 



angles; the mesonotum with a rather deep median depres- 

 sion, the posterior half slightly carinated each side and 

 minutely angulated in front; meso-metanotal constriction 

 quite deep; the basal section of the metanotum is longer 

 than the declivity and somewhat broadest posteriorly, the 

 upper surface is quite flat and slightly concave between 

 the thorus, which are rather small, acute and nearly erect. 

 Upper face of the first node nearly straight, the second 

 node nearly globular. 



Surface of the head, except between the frontal caringe, 

 quite densely and finely granulated, and with a few fine 

 strige in front and behind, and at inner and outer side of 

 eyes; space between the frontal carinas smooth; clypeus 

 sparsely and finely granulated; mandibles faintly striated 

 and quite coarsely punctured. Thorax densely granu- 

 lated, the pronotum in front with two or three transverse 

 stride. Nodes densely granulated. Abdomen smooth, 

 very fine and obscurely reticulated. Erect hairs rather 

 sparse, long and fine, somewhat shorter on legs and an- 

 tenna; appressed pubescence sparse, most dense on the 

 head. 



Polished; thorax yellow or reddish -yellow; the head 

 and nodes either of the same color or lighter or darker 

 brownish, the abdomen brown or black. Antennas and 

 femora brownish; the clypeus, tibite and tarsi generally 

 somewhat paler; mandibles yellowish, the teeth black or 

 bro v/n . 



Nine soldiers and thirteen workers. Sierra San La- 

 zaro. 



This species resembles very much Ph. breviconiis and 

 ciibaensis Mayr, but differs from both in sculpturing and 

 other characters. 



36. Pheidole susanNvE Forel, race longipes n. race. 

 Soldier: Length, 4.4 — 4.6 mm. Head longer than 



