1926 169 p., 1 map, new cloth (original printed front cover bound in), with author/title in gilt on spine. With author’s dedication. Library stamps, else very good and well bound copy.
1936 198 p., 19 (3 folding) plates, paperbound (original printed covers).The large folded plates show the different species' wings arranged in a phylogenetical tree. Spine reinforced with transparent tape, small date stamp on the title page and former owner's name on the front wrapper. Otherwise a very good copy.