Brussels: Musee Royal D'Histoire de Belgique, 1933. Quarto, numerous text illustrations and plate. Publishers printed wrappers, a total of 40 fascicles, a few small library stamps and minor blemishes, otherwise a sound clean set.

Volume one: introduction, volume two: fascicles 1-11, volume three: fascicles 1-19, volume four: fascicles 1-12 (lacks fascicles 6, 9 and 11).

The contents are devoted to invertebrates with a substantial insect component. Freight is extra.