Rennes, Imprimerie Oberthur, 1912-1921. 25 x 16,5 cm, 260 pp. Relié demi percaline verte, dos lisse, titre doré. Bon exemplaire. Nombreuses reproductions photographiques et dessins.
1912-1921 260 p., 343 figs, paperbound. Front cover slightly foxed, small (2 cm) repaired tear. Rare work privately published by Oberthur. A fine contribution to the knowledge of the larger butterflies of western France, with a good list of references, and with many illustrations. This seems to be all that was published on butterflies. The work is much rarer than the parts of the "Faune Armoricaine" on beetles.