270 BUTTERFLIES 



Malayan region, and are much more gayly attired 

 than the present sombre representative of the sub- 

 family in Europe. Their food in the larval state 

 has invariably been found to be either grasses or, 

 occasionally, with the more arctic or alpine forms, 

 sedges. In the Aix deposits, as in the Indo-Ma- 

 layan region to-day, these plants are numerically 

 unimportant, so that if we may form any opinion 

 from such meagre data, we find that while oligocene 

 Aix had a European proportion of Satyrids, they 

 were composed of species of an Indian aspect and 

 fed u^jon plants characteristically temperate, but, 

 as in tropical countries, numerically unimportant. 



The remaining NymphaHd is the Eugonia from 

 Radoboj. This is more nearly related than any 

 other to the mass of the Florissant fossils. It 

 belongs to an existing genus, represented to-day 

 equally in Europe and North America, but with 

 a fuller development of neighboring genera in the 

 New World, showing that its affinities are rather 

 with the New than with the Old World ; its food 

 in early life was probably some species of elm, 

 willow, poplar, or birch, and species of all these 

 genera have been found in the same beds. 



Passing to the Papilionidae we find three Pieri- 

 nae and one of the Papihoninae ; two of the tln'ee 



