292 The Ohio Journal of Science [Vol. XIX, No. 5, 



Subfamily Ponerin^. 



1. Mandibles long and slender, with coarse bidenticulate teeth " 



Stigmatomma Roger. 



Mandibles not long and slender or with coarse bidenticulate teeth .... 

 Ponera Latr. 



Genus Ponera Latr. 

 P. coarctata pennsylvanica Emery, 

 The workers of this species are small slender ants with 

 vestigial eyes. 



The workers nest under stones in rotten logs, vegetable 

 mold, etc. 



Genus Stigmatomma Roger. 

 S. pallipes Haldeman. 

 This species has workers which are slender, dark brown 

 in color, and have the mandibles, antennae, and legs paler. 



The workers are hypogaeic in habits and occur only in rich 

 damp woods under stones, logs, etc. It is not a common species 

 as the form is rather primitive. The colonies are small, being 

 composed of from forty to fifty individuals. 



