248 THE ENTOMOLOGIST. 
one has difficulty in separating the two species, except that 
P. orbifer is somewhat browner in colour; a few examples also 
of Hesperia alveus were flitting about with the other two species. 
The hill culminates in a bare ridge, commanding a fine view 
of the plain and the river Danube; here freshly emerged 
Parnassius mnemosyne were not infrequent, these being distinctly 
larger than my Swiss examples, and having the black blotches 
in both sexes smaller, darker, and better defined. An odd 
Chysophanid turned out to be a female of C. thersamon, a new 
species to me, and also a good example of Melitea trivia was 
netted, but not recognised until I got home. 
We paid further visits to Svab-hegy on the 8rd, 5th and 7th 
of June, and were rewarded each day by interesting species, 
including the fine form of Polyommatus orion var. ornata, not 
uncommon in the oak glades amongst the sedum plants; 
Melitea trivia was not infrequent, but very local, some of the 
specimens being already past their best. But by hard work I 
managed to get together eighteen or twenty good examples. 
M. trivia is easily recognised in flight from its confreres, for it is 
the swiftest species of the genus I have seen; and this habit, 
with its small size, makes it difficult sometimes to follow with 
the eye. From its nearest relation M. didyma, the lesser size and 
darker colour serve to distinguish M. trivia at once, whilst from 
the only species of its size flying at the same date, M. aurelia, 
it is at once separated by the more rapid flight. In one field 
M. aurelia was abundant. I used to think that specimens of 
this species, or those that I could not separate from it, taken at 
high altitudes in Switzerland, flying with M. parthenie var. 
varia, were only forms of the latter, and I do not know that this 
opinion has been much changed since; but certainly MZ. aurelia 
seems distinct enough in Hungary from any other species of 
the genus, the specimens being strictly typical and showing no 
approach to M. parthenie or to any other species; and being at 
once distinguished from M. athalia, which was flying at Buda- 
pest in early June, by size and general appearance. WM. didyma 
was just emerging; the examples were brightly coloured and 
of good size. I was much surprised to net, in a glade at 
the top of the steps before-mentioned, a fine example of Neptis 
lucilla, a species I had not expected to come across at Budapest. 
I had been provided by my friend Mr. A. H. Jones, who 
most kindly placed at my disposal the results of his successful 
visit to Hungary two years previously, a letter of introduction 
to Herr Aigner of the Budapest National Museum. Accordingly 
we called there on May 81st, but learnt that Herr Aigner had 
been unable to follow his duties at the Museum for a consider- 
able time; and I am sure all who are interested in entomology, 
especially those who have visited Hungary, will greatly regret 
that his long illness terminated fatally in June. 
