No. 417.] NESTS OF AMERICAN ANTS. 715 
Garden of the Gods. The slaves, according to McCook, 
belonged to F. schaufussi, Recently Rev. P. J. Schmitt has 
sent me specimens of P. óreviceps from Breckenridge, Col. 
In this case the slaves accompanying the specimens belong 
to a rather small, monticolous subvariety of Z subsericea 
(Fig. 15, c, a). 
23. Polyergus rufescens Latr., subsp. mexicanus Forel. 
This Mexican subspecies (Forel, '99, p. 129) is related to 
breviceps, but is larger, and without pubescence on the upper 
surface of the body. The exact locality of Forel’s specimens 
is not given. It is safe to say that they must have been taken 
somewhere on the high plateau of central or northern Mexico. 
The auxiliary Species is not recorded, but it is probable that 
the varieties of F Jusca (F. subsericea and F. neorufibarbts) 
recorded from the Mexican plateau (Forel, '99, p. 128) furnish 
the requisite slaves.2 
24. Tomognathus americanus Emery. 
This Species (Fig. 17), which is both smaller and in other 
respects quite distinct from the European sub/evis, appears 
to be very rare. The type specimens were taken by Mr. 
Pergande at Washington, D.C., in a nest of Leptothorax curvt- 
Spinosus Mayr (Fig. 18), but no observations on the mutual 
relations of the two species were recorded. Rev. P. J. Schmitt 
of tty, Pa., writes me: “I have taken this species on but 
one occasion, — when I carried home a bushel of sifted vege- 
table matter from the woods. On examining this carefully 
* While this article was going to press I discovered a fine large colony of P. 
breviceps in some woods near Rockford, Ill. The ants with their slaves — in this 
ance Formica fusca L., var. subenescens Emery — were living in a rotten stump 
m Cavities excavated and long since abandoned by Camponotus pennsylvanicus. 
The Polyergus workers, like the Colorado specimens, are of small size with dis 
unctly club-shaped antennal scapes. The head and thorax are opaque and the 
abdomen are long and projecting. The abdomen is shining and 
nearly black in color. : OE | 
xs Buckley C66, p. 170) describes a black female ant from Texas as Polyergus 
ana, but no one has since succeeded in recognizing this species. Itis probably 
not a Polyergus at all 
