886 CALIFORNIA ACADEMY OF SCIENCES. 



broad, the sides gently arcuated, the occiput deeply 

 emarginate; the face with a rather deep median channel. 

 Frontal carinse nearly half the length of the head. Fron- 

 tal area triangular. Clypeus with a sharp median carina; 

 the anterior margin slightly sinuate each side and with a 

 shallow and broad emargination at the middle. Mandi- 

 bles with two large teeth at the apex. Antenna rather 

 slender, the scape reaching somewhat beyond the occi- 

 put. Pronotum without lateral tubercles; mesonotal de- 

 pression not as strong and the metanotal spines longer and 

 stouter than in the worker; second node nearly globular. 



Head sub-opaque and densely granulated, the anterior 

 half distantly striated and faintly reticulated, the posterior 

 half with elongated, shallow depressions; space between 

 the frontal caringe quite smooth and faintly shagreened; 

 the frontal area polished; clypeus faintly rugose about the 

 middle and somewhat more coarsely so each side. Man- 

 dibles polished, rather densely and quite coarsely striated, 

 sparsely, and very coarsely punctured near the cutting 

 edge. Thorax finely and densely granulated, the granu- 

 lation slightly coarser in the longitudinal depression of the 

 metanotum; second node distinctly shagreened. Abdo- 

 men densely granulated, more coarsely so on the first 

 segment and with numerous, more or less elongated shal- 

 low depressions and hair -bearing points. Erect hairs 

 yellowish, coarsest and densest on the abdomen, very 

 sparse on the 'thorax. 



Color reddish -yellow; antennae, mandibles and abdo- 

 men slightly brownish, anterior margin of the clypeus, 

 the cutting edge and teeth of the mandibles brown. 

 Eyes black. 



Worker: Length, 3 mm. Head much longer than 

 broad, much prolonged and tapering beyond the eyes, 

 with a deep constriction at the end, forming a distinct 



