052 CALIFORNIA ACADEMY OF SCIENCES. 



metanotum very similar to that of the worker, the spines 

 short and stout. Second node nearly globular. 



Polished; the anterior third or more of the head quite 

 densely and longitudinally striated, the rest sparsely 

 punctured, the occiput with faint transverse wrinkles. 

 Median section of the clypeus finely striated, the lateral 

 section smooth. Mandibles polished and with but few 

 punctures. Prothorax smooth or very faintly sculptured 

 in front; the mesothorax smooth above and densely gran- 

 ulated at the sides; metathorax granulated above and at 

 the sides. Nodes and abdomen smooth. Erect hairs 

 white and rather sparse. 



Black or dark brown; the anterior margin of the head, 

 clypeus, mandibles, antennee and legs yellowish or brown- 

 ish-yellow. 



Worker: Length, 1.8 mm. Head somewhat longer 

 than broad, the posterior angles broadly rounded, the oc- 

 ciput distinctly emarginate; the face with a delicate me- 

 dian furrow. Frontal area distinct, triangular. Clypeus 

 with a faint median carina and delicate oblique striae each 

 side of it, the anterior margin not emarginate. Antennae 

 rather short, the scape reaching but slightly beyond the 

 occiput, the club longer than the remaining joints of the 

 flagellum. Prothorax somewhat narrower than the head, 

 rounded above and at the sides. Pro- and mesonotum 

 without an apparent dividing suture; the mesonotum ta- 

 pering posteriorly and without a transverse depression; 

 meso-metanotal constriction quite deep; metanotum flat 

 above and faintly broadest behind, the spines reduced to 

 short, stout teeth, between which the surface is slightly 

 concave. Nodes as in the soldier. 



Polished. Head, with a few, almost imperceptible, 

 short strise between the frontal carinee and in front of 

 the eyes; punctures very fine and sparse. Mandibles 



