MEXICAN FORMICIDyE, 867 



and behind, broadest above, the edge sharp and semicir^ 

 cular. Abdomen short, broadly oval, about as long as 

 the thorax and rather broader than the head. Legs 

 stout. Head densely and quite coarsely granulated. 

 Thorax densely rugoso-granulate, the sculpturing slightly 

 stronger than that of the head and somewhat concentric 

 towards the sides of the pronotum; declivity of the me- 

 tonotum as well as both sides of the scale transversely 

 striated. Abdomen with dense and fine transverse wrin- 

 kles. Head and thorax semi -opaque; mandibles, legs 

 and abdomen polished. 



Erect hairs white, most dense and rather coarse on the 

 abdomen, longer and finer on the thorax and base of the 

 abdomen; quite profuse on the scape and legs. Ap- 

 pressed pubescence very scarce, most dense on the fla- 

 gellum. 



Color black; mandibles, and sometimes the entire an- 

 tennae reddish -yellow, the flagellum generally brownish 

 towards the end. Eyes brown. Legs paler or darker 

 brown, the tarsi and trochanters generally brownish -yel- 

 low. 



Twelve specimens. Tepic. 



9. AzTEKA ccERULEiPENNis Emery var. fasciata 

 n. var. 



Large worker: Length, 3.4-3.6 mm. Head somewhat 

 longer than broad, slightly narrowest anteriorly, the sides 

 gently arcuate, posterior angles rounded, the occiput 

 quite deeply emarginate. Clypeus very broad, its lateral 

 lobes extending to the sides of the head, the anterior 

 margin but slightly arcuate. Mandibles robust and armed 

 with eight or nine acute teeth. Scape about as long as 

 the head and reaching somewhat beyond the occiput. 

 Prothorax about one-fourth narrower than the head, con- 

 vex above and at the sides, rounded in front. The me- 



