670 Bulletin American Museum of Natural History. [Vol. XXIII, 



silvesfrii Emery; hahani Emery; landolti Forel; versicolor Pergande with 

 the subsp. chisosensis Wheeler. 



Subgenus Acromyrmex Mayr, including: A. subterranea Forel; lobi- 

 cornis Emery and its var. ferruginea Emery; lundi Guerin; ambigua Emery; 

 pubescens Emery with the subsp. bonariensis Emery and decolor Emery; 

 emilii Forel; octospmosa Reich with the var. echinatior Forel; mwlleri 

 Forel with the vars. panamensis Forel and meinerti Forel, and the subsp. 

 modesta Forel with the var. andicola Forel; coronata Forel; mesonotalis 

 Emery; disci gera Mayr; muticinoda Forel with the var. homalops Emery; 

 7iigra F. Smith; aspersa F. Smith with the var. rugosa F. Smith; laticeps 

 Emery; boliviensis Emery; iheringi Emery. 



Subgenus Trachymyrmex Forel, including: T. tirichi Forel with the 

 subsp. fusca Emery; pruinosa Emery; septentrionalis McCook with the var. 

 obscurior Wheeler; turrifex Wheeler; arizonensis Wheeler; jamaicensis 

 Ern. Andre; saussureiYore\; squamulijera 'Eva.&ry ; farinosa Ornery. 



Subgenus Mycetosoritis Wheeler, including: M. hartmanni Wheeler; 

 aspera Mayr. 



Subgenus Mycocepurus Forel, including: M. goldii Forel, smitki Forel 

 with the vars. tolieca Wheeler and borinquenensis Wheeler. 



Genus Cyphomyrmex Mayr. 



C. rimosus Spinola with the subsp. rtiimitus Mayr, salvini Forel, 

 dentatus Forel, transversus'EviiQvy and olindanus Forel, and the vars. major 

 Forel, fusca Emery and comalensis Wheeler; parallelus Emery; o/ttor Forel; 

 auritus Mayr; morschi Emery; simplex Emery; strigatus Mayr; wheeleri 

 Forel; kirbyi INIayr; flavidus Pergande; championi Forel; foxi Ern. Andre; 

 bigibbosus Emery. 



Genus Myrmicocrypta F. Smith. 



M. squamosa F. Smith; dilacerta Forel with the subsp. cornuta Forel; 

 subnitida Forel; godmani Forel; brittoni Wheeler. 



Genus Sericomyrmex Mayr. 

 S. opacus Mayr; aztecus Forel; saussurei Emery. 



