380 Bttlletin American Museum of Natural History. [Vol. XXI, 



Mayr under the name of Ph. pennsylvanica, came from New Jersey. 

 It nests in sandy or gravelly soil and usually constructs obscure 

 craters with several openings. More rarely it may be seen nesting 

 under stones. The huge-headed soldiers, which are rarely present 

 in considerable numbers, are very timid and seek the remotest 

 galleries whenever the nests are disturbed. As Morris (Amer. Natural- 

 ist, Sept., 1880, pp. 669-670) showed long ago. Ph. pilijera is a true 

 harvesting ant, storing the chambers of its nests with seeds of grasses 

 and other herbaceous" plants. But like other harvesting species 

 {Pogonomyrmex species, Solenopsis geminata and several species of 

 Pheidole in the Western and Southwestern States) it is also very fond 

 of animal food. I have seen the foraging workers of pilijera hurrying 

 to their nests with small insects (Jassids, Aphides, etc.). A marriage 

 flight was witnessed July 27 at Rockford, 111. 



17. Ph. morrisi Fore/. — The t3"pes of this species were collected 

 by Morris at Vineland, but it is common in the pine barrens as far 

 north as Lakehurst. It prefers the pure sand and forms low diffuse 

 and often very untidy moundlets sometimes covering one or two 

 square feet and often about the roots of some plant. These nests are 

 very different from the single compact dome-shaped craters in which 

 Forel found this species in North Carolina and in which I have seen it 

 nesting at Jacksonville, Florida, and Montopolis, Texas. The slender 

 yellow workers are extremely active in their movements, the soldiers 

 rather weak and timid. The species is carnivorous. Forel is clearly 

 justified in separating it from Ph. dentata Mayr. 



18. Ph. vinelandica Forel. — The types of this species, as the name 

 indicates, came from Vineland, N. J. (Mrs. Mary Treat). It is not 

 uncommon in the pine barrens where the soil contains some clay. 

 The nests are diminutive scattered craters, rarely more than i-i^ 

 inches in diameter. This species occurs also at North Woodbury 

 (Viereck), and even as far north as Bronxville, N. Y., where I have 

 taken it in a single locality. 



19. Ph. davisi sp. no v. 



Soldier. - — Length 3 mm. 



Mandibles bidentate at the tip. Head, excluding the mandibles, hardly 

 longer than broad, subquadrate, with slightly convex sides; occipital border 

 deeply excised; upper surface convex, with the occipital groove extending 

 forward to the middle. Eyes about one third the distance from the anterior 

 to the posterior corner. Frontal carinas short, not half as long as the antennal 

 scape, rapidly subsiding behind. Clypeus short, flattened in front, somewhat 

 convex behind, without a median keel; anterior border rather broadly excised 



