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



F. (N.) pallide-fulva schaufussi Mayr. 



A very common form throughout the Northeastern States. 



Their colonies, which are fairly large, consist of nests 

 under stones or in craters in open sunny fields, pastures, etc. 



The workers are very timid. They feed on dead insects and 

 the excretions of aphids. 



F. (N.) pallide-fulva schaufussi var. incerta Emery. 

 This variety has habits similar to those of F. schaufussi, 

 but ranges farther west than that species. There is a con- 

 siderable variation in the individuals from different colonies 

 or localities and it is not always easy to separate this species 

 from the species 7iitidiventris or schaufussi. 



F. (N.) pallide-fulva nitidiventris Emery. 

 This species has a range that nearly coincides with that of 

 incerta. The habits of F. nitidiventris are similar to those of 

 the species just discussed. 



F. (N.) pallide-fulva nitidiventris var. fuscata Emery. 

 The workers are much darker than those of F. nitidiventris. 

 The habits of the two, are however, practically the same. 



Subfamily Myrmicince. 



1. Postpetiole joined to the dorsal surface of the gaster. . .Cremastogaster Lund. 

 Postpetiole not joined to the dorsal surface of the gaster 2. 



2. Eyes vestigial Stenamma Westwood. 



Eyes not vestigial 3. 



3. Antennas with two jointed club Solenopsis Fabr. 



Antennas without a two jointed club 4. 



4. Epinotum with spines 5. 



Epinotum without spines Monomorinm Mayr. 



5. Antennas with a three jointed club 6. 



Antennae without a three jointed club 7. 



6. Prothorax distinctly angular anteriorly Tetramorium Mayr. 



Prothorax not angular anteriorly; small ants that nest in galls, nuts, etc. . 



Leplothorax Mayr. 



7. Promesonotal suture very distinct dorsally Aphcenogaster Mayr. 



Promesonotal suture not very distinct dorsally; head and thorax coarsely 



rugose reticulate Myrmica Latr. 



Genus Cremastogaster Lund. 



C. lineolata Say. 

 This species ranges over the whole of North America from 

 the Atlantic to the Pacific to an altitude of about 7,000 feet 

 in the Rocky Mountains. There are a number of varieties 

 and subspecies of this form. 



