PREFACE. VII 



ginal plan was that the fu'st 100 parts should be almost exclusively Palearctie, so that the Palearctic divi- 

 sion of the work would conclude with part 100 i.ssued in 1909. But the very numerous subscribers to the 

 much more important Exotic division — there being no similar works on Exotics in existence — protested, 

 demanding that at least the larger butterflies of the Exotic fauna should be dealt with first. Especially the 

 subscribers residing in Africa argued that on account of the climate their sojourn in that continent usually 

 only lasted a few years, and that a work issued in parts extending over many years would be of little use 

 to them. This argument is so sound and the request so reasonable that we have attempted to conciliate 

 each party by publishing the Palearctic parts alternately with those dealing with the families of the larger 

 Exotic Rhopalocera, the latter being now also concluded with the Nymphalids just issued. 



Darmstadt, Sept. 30th, 1912. Adalbert .Seitz. 



