CALIFORNIA ACADEMY OF SCIENCES. 



It seems also to be related to Pheidole (Atta) testacea 

 Smith. 



37. Pheidole subdentata n. sp. 



Worker: Length, 2.6 mm. Head nearly twice as long 

 as broad, the sides parallel and slightly arcuated, rounded 

 behind; clypeus convex, rounded behind, arcuate in 

 front, the lateral angles reaching to the mandibles, with- 

 out a median carina; frontal area but feebly indicated; 

 mandibles of the usual shape, armed with two long teeth 

 at the apex and six or seven minute teeth behind them. 

 Antenna rather long and slender, the scape almost twice 

 as long as the head. All joints of the flagellum longer 

 than thick, the club being about one -half the length. 

 Pronotum about one -fourth narrower than the head, 

 rounded above and at the sides, prolonged into a neck 

 anteriorly; mesonotal depression shallow; meso-metano- 

 tal constriction deep; metanotum somewhat elevated pos- 

 teriorly and slightly curved longitudinally, convex above 

 and with a slight longitudinal furrow at base, the basal 

 section much longer than the declivity and furnished with 

 two minute teeth. Nodes of the usual shape. 



Head smooth, sparsely striated in front of eyes and be- 

 tween base of antennge; antennal grooves slightly granu- 

 lated. Clypeus smooth, with few and indistinct strige. 

 Mandibles smooth, faintly and sparsel}^ punctured. Pro- 

 notum and anterior half of mesonotum above, faintly sha- 

 greened and with a few hair-bearing points, posterior half 

 of the mesothorax and the metathorax densely granulated ; 

 nodes and abdomen smooth, the petiole of the first node 

 granulated laterally; the first segment of the abdomen 

 sometimes with a few elongated, shallow, obsolete depres- 

 sions. Erect hairs rather sparse, pale and slender. 



Polished; yellowish -brown, the head and abdomen 



