MANN: THE ANTS OF BRAZIL. 473 



185. Dorymyrmex pyramicus (Roger). 



Many workers were found at Natal, and Itacoatiara. In the yard 

 of our house at Natal this and the succeeding variety were very 

 abundant, in small crater nests. 



186. Dorymyrmex pyramicus (Roger) subsp. flavus McCook. 



Very common at Natal. This and the preceding have a wide 

 distribution, ranging from Illinois in the United States to Argentina. 

 Strangely, in spite of the adaptive nature of this ant, it has not spread 

 out of the Americas. 



187. Tapinoma melanocephahim (Fabricius). 



Many specimens of this common tropicopolitan species were found 

 at Para and Porto Velho. 



Camponotinae. 



188. Brachymyrmex coactus Mayr. 



One colony was found at Independencia, nesting in a twig. 



189. Brachymyrmex admoius Mayr. 

 One colony was taken at Ceara-Mirim. 



190. Brachymyrmex pictus Mayr. 

 Taken at Para and Manaos. 



191. Myrmelachista (Decamera) bambusarum Forel. 



Workers taken at Itacoatiara agree with Forel's description of this 

 species from Sao Paulo. The type specimens were nesting in bamboo. 



192, Gigantiops destructor (Fabricius). 



Found commonly at Para, Abuna, Porto Velho, and Madeira- 

 Mamore Camps 39 and 41. In life this was one of the most 



