94 ANTS. 



2. The macraner is an unusually large form of male which occa- 

 >i<>nally occurs in populous colonies. 



3. The micrancr or dwarf male, differs from the typical form 

 merely in its smaller >tature. Such forms often arise in artificial nests. 



4. The dor\htncr is an unusually large form peculiar to the driver 



FIG. 55. Acanthomyops claviger and A. latipes. ("Original.) A. Deiilated female 

 of A. cliii'iger ; B, a-female of A. latipcs ; C. /3-female of same. 



and legionary ants of the subfamily Dorylinre (Dorylns and Ecitont. 

 It is characterized by its large and peculiarly modified mandibles, long 

 cylindrical gaster and singular genitalia (Figs. 141, E, and 142). It 

 may be regarded as an aberrant macraner that has come to be the 

 typical male of the Dorylinse. 



5. The crgatancr, ergatomorphic, or ergatoid male resembles the 

 worker in having no wings and in- the structure of the antennae. It 

 occurs in the genera Poncra. Fonnico.reniis, Syiuniyniiica, Tcchno- 

 inynuc.r and Cardiocondyla. In certain species of Poncra ( P. pinicta- 

 tissiina and crgatandria] and in Formicoxen-ns nitiditlits the head and 

 thorax are surprisingly worker-like, in other forms like Syniiiivnnica 

 chaiiibcrlini these parts are more like those of the ordinary ant. while 

 P. cduardi shows a more intermediate development of the head with a 



