THE BUTTERFLIES OF CENTRAL HUNGARY. 87 



in one or two cases with locality. In the peculiar dimorphic 

 P. minor I have not found any inkling as to the conditions that 

 determine the resultant form. Those species that are flightless 

 have a more contracted metathorax than the winged forms, and 

 I have suspected that slight differences of this sort exist in the 

 dimorphic species, but it is a difficult point to prove. After 

 dissection the capacity of the metathorax cannot be determined 

 with any certainty. 



To prevent misconception, I may add that Pterostichus in- 

 cludes an unusually large proportion of flightless forms. 



THE BUTTERFLIES OF THE CSEHTELEK DISTRICT 

 OF CENTRAL HUNGARY. 



By the Hon. N. Charles Rothschild, M.A., F.L.S., and 

 Charlotte de Wertheimstein. 



So little has been published about the Lepidoptera of Hun- 

 gary, even in that country itself, that these few notes may 

 possibly be of interest. 



Csehtelek is a village in the Margitta district of the County 

 of Bihar, in Hungary, and is already considerably east of the 

 great plain or alfold, which, however, extends to Margitta. It 

 is, therefore, perhaps superfluous to point out that the real alfold 

 fauna is missing from this district. Csehtelek is situated in 

 the valley of the Bisztra, a small river rising in the Rez Moun- 

 tains, some ten kilometres south-east of the village, and flowing 

 from its source for some twenty kilometres in a north-westerly 

 direction, where it joins the Berettyo River near Margitta. 

 The country presents three more or less distinct types of vegeta- 

 tion, all of which intergrade. They are designated in our list by 

 the numbers I., II., III., respectively. The first of these is found 

 on the land bordering the river, which is liable to floods in the 

 spring and more rarely in the autumn. The country here con- 

 sists of wet, grassy fields, in no sense swamps, used both for hay 

 and grazing. Here Chrysophanus dispar var. rutilus is found, 

 and many other of the commoner species, such as Argynnis 

 selene, Lyccena argiades, L. argus, and L. argyrognomon. 



The second type occurs on the sandy hills which border the 

 north side of the river for about two-thirds of its length from 

 the point at which the Bisztra leaves the forest-clad mountains. 

 These hills form the edge of a high plateau which lies between 

 the Bisztra and the upper waters of the Berettyo. At one time 

 much of this land was devoted to plum-orchards, planted in the 

 old style, and consequently the original vegetation was retained. 

 Now but few uncultivated patches remain, though these possess a 

 flora and insect fauna of quite remarkable richness. 



