WILLIAM MORTON WHEELER 



Ants Collected by Prof. F. Silvestri 



in MEXICO 



The following series of ants, taken by Professor Filippo Sil- 

 vestri during the course c»f a very hasty visit to tropical Mexico 

 and while engaged in making extensive collections of other Ar- 

 thropods , comprises an unusual number of interesting forms. 

 Among these there is a new and aberrant species of Mega- 

 loiuynnex {M. silvestri i) and two other species, C/'ertiastogaster 

 foi-mosa and Ectatomma inteìTuptum, which seem not to have 

 been taken since they were first described many years ago by 

 Mayr. 



Family Formicidae. 



Subfamily Ponerinae. 



\. — Pachycondyla harpax Fabr. subsp. montezumia F. Smith. 

 A single immature worker from Cordoba in Vera Cruz. 



2. — Ectatomma (Holcoponera) strigatum Norton. 

 Eight workers from Jalapa in Vera Cruz. 

 3. — Ectatomma (Gnamptogenys) interruptum Mayr. 



Seven workers and four immature females from San Fran- 

 cisco in Vera Cruz. 



The workers agree very closely with Mayr's desci-iption and 

 the females are much like the workers in size and sculpture. The 



