PLATE V.

FIG. 1.

Embryo nest of tree-wasp at a very early stage, with no more than four rudimentary cells, and only a single hood springing from a triangular strap of paper. Natural size. p. 187.

FIG. 2.

Embryo nest of V. britannica (?) at a somewhat later period, attached to a shred of matting; the bottom of the nest not yet closed in. Natural size. p. 188.