3^2 Bulletin American Museum of Natural History. [Vol. XXI, 



Mandibles yellow, with dark brown or black teeth; head and gaster black; 

 thorax and pedicel black or very dark brown, with yellowish articulations. 

 Antennae and legs yellow, the former with the club more or less infuscated, the 

 latter with the middle portions of the femora and tibiae black. 



The types are from Lakehurst. There is also a single soldier from 

 Lucaston (Daecke) in my collection. This ant lives in small colonies 

 in the pure, white sand of the pine barrens and makes small craters 

 somewhat larger than those of Ph. vinelandica. It is allied to Ph. 

 bicarinata Mayr and Ph. vinelandica. The soldier differs from that 

 of bicarinata in its smaller size, darker color, shorter head, and more 

 extensive sculpture of the head and thorax. The worker is at once 

 distinguished by the opaque, densely punctate thorax, darker color, 

 and smaller size. The soldier of davisi differs from that of vine- 

 landica in its much darker color, less deeply emarginate clypeus, 

 shorter head and frontal carinae; while the differences between the 

 workers of the two species are similar to those between davisi and 

 bicarinata. 



I take pleasure in dedicating this new Pheidole to Mr. Wm. T. 

 Davis, the well-known naturalist of Staten Island, who introduced 

 me to the interesting fauna and flora of the pine barrens. 



Stenamma Mayr. 



20. S. brevicorne Mayr. — I have seen five workers of the large 

 typical form of this rare species from Riverton (Viereck). It nests 

 under stones and dead leaves in rich, shady woods. For further 

 notes on its habits see my paper: ' The North American Ants of the 

 Genus Stenamma sensu stricto,' Psyche, Aug., 1903, pp. 164-168. 



(Subgenus Aphcsnogaster Mayr.) 



21. S. (A.) tennesseense Mayr. — This species in all probability 

 ■occurs in New Jersey, since it is known from several localities in Penn- 

 sylvania, at least as far east as the Lehigh Water Gap. I have taken 

 it also in Connecticut. It differs from our other species of Aphceno- 

 gaster in having very small and very smooth females with huge 

 epinotal spines. These aberrant females probably establish their 

 ■colonies in nests of 5. fulvum, in the same way that Formica difficilis 

 var. consocians establishes its colonies in nests of F. schaufussi var. 

 incerta (vide infra). At least tennesseense is known to occur only in 

 regions where fulvum is unusually abundant, and several mixed colo- 

 nies of the two species, containing queens of tennesseense only, have 

 been recorded. 



