434 Mound-Making Ants of the Alleghenies. [July, 
continued for the remainder of our stay, I had full opportunity by 
Sa observations to verify my notes. 
Fig. 5 is another example of architecture drawn from the same 
broken hill. The figure represents a double gallery which was 
built up against the perpendicular side H of a hole cut by the 
spade in removing the cone. The gallery æ a a was carried along 
the base of the side three inches, and then upwards toward the 
surface. The gallery was widened at two points, c c, to one and 
a half inches, as though intended to serve as store-rooms for 
cocoons. Galleries opening downward communicated with these 
enlargements. At ¢ ants were arranging pellets along a projec- 
tion on the side, for what purpose was not apparent. 
My attention was next directed to a large hill, which with its 
surrounding hill-cluster was on my regular “ list.’ I took this 
plan of keeping several hills under regular, daily, and indeed 
for much of the time hourly observation, for the obvious reason 
that thus I could become “acquainted” with the workers, 
could trace the work done, and confirm or condemn previous 
conclusions as the case might be. In this hill a track had been 
made by one of a herd of cattle grazing in the field. The foot of 
the steer had left an irregular depression measuring nine inches 
each way, in depth eight to nine inches, the lower margin being 
six inches from the base of the hill. 
Fic. 5 TERPS a porri gallery a a a, and chambers ¢ c c. 
Engineering —The lower part of this track is shown at Fig. ©, 
