PART I.—HARVESTING ANTS.
Plate I., p. 21, fig. A.—View of the entrance to a nest of Atta barbara,
showing part of a train of ants bearing seeds, the conical mound of
refuse thrown out, and some seedlings, which have sprung up from
seeds accidentally dropped by the ants; B, one of the larger workers of
this species, of the natural size, and B 1, its abdomen and pedicle, with
two nodes, magnified; C*, one of the smaller workers, of the natural
size; C, a male, of the natural size; D, a female, of the natural size;
D 1, wing of the same, magnified; D 2, mouth organs of the same,
magnified, with the mandibles removed, the two outer pieces being the
maxillæ and their palpi, and the lozenge-shaped piece the labium, from
the upper part of which the labial palpi spring, while behind the labium
is the true tongue; D 3, one of the mandibles, magnified; E, a larva,
of the natural size, and E 1, the same, magnified.
Plate II., p. 22, fig. A.—A trowel containing earth, in which a granary full of seeds is lying almost undisturbed, of the natural size; B, the crater-like entrances found at the mouths of the nests of Atta structor, reduced to one-half the natural size.
Plate III., p. 23.—The floors of three granaries of Atta barbara, surrounded by the much coarser gravelly earth, of the natural size.
Plate IV., p. 31.—A mass of earth pierced by roots, in which the ants (Atta barbara) have made their granaries and galleries. The galleries were full of seeds when first laid open. Of the natural size.
Plate V., p. 33, fig. A.—Galleries and terminal cells of a nest of Atta barbara, excavated in the living sandstone rock, drawn in situ, of the natural size; B, part of a cylindrical gallery from another rock-nest, and B 1, the same gallery seen in front, of the natural size.
Plate VI., p. 35, fig. A.—A sprouting hempseed, part of the radicle of which has been gnawed by the ants, of the natural size; A 1, the same, magnified, rad. radicle; A 2, an entire sprouting seed of the same, magnified; B, a sprouting pea, part of the radicle of which has been gnawed off; B 1, the same, magnified; B 2, the same stripped of its
