164 CALIFORNIA ACADEMY OF SCIENCES. 



represented by minute, toothlike projections at the termi- 

 nation of the metathoracic ridges. Nodes of petiole erect, 

 the posterior one stoutest. Head, thorax and abdomen 

 furnished with rather sparsely set, fine, erect, j^ellowish 

 hairs: those of the antennae and legs shorter and less 

 erect. 



Color black, polished. Mandibles, flagellum and tarsi 

 reddish-brown; the flagellum darkest towards base, with 

 the apex of the joints blackish. Scape and legs dark 

 brown. 



This species may be easily mistaken for Aph. Pcrgan- 

 dci, with which it agrees in size and coloration, but may 

 be readily distinguished from it b}' the striated head and 

 metathorax, the absence of metathoracic spines and the 

 much higher second- node of the petiolus. 



Described from eight specimens. 



Sierra Laguna and El Chinche. 



6. Apii.^nogaster juliana n. sp. 



Length, 5-7 mm. Head quadrangular, somewhat longer 

 than wide ; its sides almost straight, faintly broader be- 

 hind ; posterior angles rounded. Surface polished, with 

 fine and dense stria?, somewhat coarser in front of eyes 

 and slightly diverging posteriorly; striae of vertex trans- 

 verse. Spaces between the stria?, with few, scattered, 

 shallow punctures. 



Mandibles stout, similar to those of Pogononiyrmex , 

 with two prominent teeth at apex and three to four rudi- 

 mentary teeth; the surface coarsely striated. 



Prothorax transversely rugose, with the space between 

 the ruga? granulated; meso- and metathorax longitudi- 

 nally rugose and densely granulated between the rug« at 

 the sides of the metathorax. Spines of metathorax large 

 and diverging posteriorly; the space between the spines 

 finely granulated; the posterior declivity smooth. 



