All the figures here given are of the natural size, and illustrate 
176 species. 
The negatives were taken from the originals by the Museum 
Photographer, Mr. H. Barnes, and reproduced by the heliotype 
process at the Government Printing Office under the personal 
supervision of Mr. A. Edward Dyer. 
The proof plates have been carefully coloured from the original 
specimens by Mr. G. H. Barrow, Artist at the Museum. 
