Species of Aculeate Ilymenoptera. 31 



teriorly and rounded in front. Abdomen oblong-ovate, the scale 

 of the peduncle incrassate, its superior margin rounded. 



Genus Tapinoma, Foerst. 

 Tapinoma mstabiUs. 

 T. nigro-fusca, cinerascenti micaiis ; pedum articulis tarsisque 



pallidis ; squama depressa. 

 Worker. Length 1| lines. Brown-black, with the anterior half 

 of the head, or sometimes the entire head, rufo-testaceous ; shin- 

 ing and having a thin sericeous pilosity ; the head heart-shaped, the 

 eyes placed rather forwards and inwards ; the antennae inserted 

 rather wide apart ; the flagellum sliglitly thickened towards the 

 apex. The thorax narrowed posteriorly, the metathorax oblique, 

 with the scale of the peduncle inclined forwards against it ; the 

 articulations of the legs and the tarsi pale testaceous, the claw- 

 joint rufo-piceous. Abdomen ovate. 



Genus PoLYRHACHis, Smith. 

 1. Polyrhacliis bispinosus, Smith, Cat, Hym, pt. vi. {Fur- 



m'icidcs\ p. 74, 50). 

 Formica bispinosa, Oliv. Encycl. Meth. vi. p. 502, CO. 



Latr. Fourm. 133, pi. iv. fig, 20. 

 Formica fungosa, Fabr. Syst. Piez. p. 410, 60. 

 Hab. Santarem ; St. Paul (Brazil). 



This is a well known ant in Brazil, the material of which it 

 forms its nest furnishes an article of commerce used as tinder for 

 lighting cigars, &c. 



Sub-family PONERIDiE. 



Genus Odontomachus, Latr. 



1. Odontomachus hcematodes, Latr. Gen. Crust, et Ins. iv. 128. 



Formica hcematoda, Linn. Syst. Nat. i. 'dQ>5, 17. 

 Hab. Para ; Cayenne. 



Genus Ponera, Latr. 

 1. Ponera pedunculata, Smith, Cat. Hym. pt. vi. (Formicida;), 96, 46. 

 Hab. Rio. 



Genus Ectatomma, Smith. 

 Ectalomma scahrosa. 



E. fusco-brunnea ; capite, thorace, abdomine, segmento primo 



rugosis. 

 Worker. Length 3| lines. Fusco-ferruginous, with the man- 



