Antling

Certainly, the kicking of the imprisoned antling is apparent enough to attract even the most stupid nurse, and the vigor of the motions, perhaps even the beginning of them, might easily give warning of the proper time for cutting the envelop.

This antling was, as indeed all the larvae and cocoons appeared to be, of the dwarf caste.

Some of these caves were used as nurseries for eggs, larvaa, and antlings; [...]

Fortunately it so "happens " — if that be the lawful word — that its puparium is invariably formed at the posterior pole of the ant cocoon, directly opposite the anterior pole from which, as the point next to its jaws in its recumbent position, the antling emerges, and to which, as the point of fracture, the strain and force within and without are directed.