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. Lapinoma melanocephalum (Fabricius). 
Many specimens of this common tropicopolitan species were found 
at Pardé and Porto Velho. 
CAMPONOTINAE. 
188. Brachymyrmex coactus Mayr. 
One colony was found at Independencia, nesting in a twig. 
189. Brachymyrmex admotus Mayr. 
One colony was taken at Cear4-Mirim. 
190. Brachymyrmex pictus Mayr. 
Taken at Paré 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 Par, Abundé, Porto Velho, and Madeira- 
Mamoré Camps 39 and 41. In life this was one of the most 
