110 THE ENTOMOLOGIST S RECORD. 
line, some 100 feet along the waterside of the extreme edge of the 
vegetation. ‘This, of course, meant that I had to stand in the water to 
get them. I tried to find where they came from, but failed to see 
them approach from an outer area at any time, and those missed 
seemed to sink away one could not see where. These arsilache forms 
were most elusive, whereas the ordinary form of pales, mostly, I believe 
I am correct in saying all, males, were flying swiftly around. They 
were quite scarce, never at any time did I see more than two at once, 
and often five, ten, or fifteen minutes between my individual captures. 
No other species of Lepidoptera were noted while around this lake, but 
on coming away through the woods towards St. Moritz Bad a single 
Krebia euryale was met with, and no others seen. The scarcity of this 
usually very abundant /Mrebia in every spot or corner in which lL 
collected, was most remarkable. 
August 2nd was another of the beautiful days, and I quote two terse 
phrases from my note-book; “ Insects in thousands,” and “ The first 
day of flies.” The fore-noon was spent in the road that for weeks 
became a more or less usual walk one part or other of the day, the road 
leading to the Suvretta Thal. All species noted there before were as a 
rule in large numbers. Perhaps Hrebia tyndarus was the most 
abundant. The one EH. epiphron v. cassiope captured was probably 
a stray from the stony pastures far up on the slopes of Piz Nair. 
F. ewryale was still very scarce. HE. melampus was noted and probably 
in abundance. The object to-day was to get more Brenthis ino, but it 
was very scarce, or I failed to trace its headquarters, only one or two 
specimens were obtained among the few scattered trees some half way 
along the road. Brenthis pales, of course, were all examined. ‘The 
females were large, in fact larger than one would expect at over 
6,000ft. up. They were very yellow on the underside, hindwing well 
marked with silvery white, the form isis. Not one was of the napaea 
form with dark suffusion and purple sheen, like those found in more 
moist localities less exposed to the sun. All the thistles were now 
tenanted with such countless numbers of Aryynnis aglaia and A. niobe, 
that it,was quite easy to pick your specimens with finger and thumb. 
It was on this day that I obtained the beautiful aberration of A, aylata 
(niobe ?) previously described [See Proceed. 8. Lond. Ent. and N.H.S. 
(1814-15), p. 183], on some thistles growing in the deserted garden of 
a villa formerly used by Prince Henry of Prussia. 
‘On the upperside the usual black markings are symmetrically 
run together and extended in area to form an irregular transverse 
black banding across all four wings, the submarginal orange 
lunules barely and most indefinitely defined, the black veining, 
wherever it is at all apparent, widely emphasised, and the 
usually wide band of orange imside the lunules only marked 
by small unconnected remnants. On the underside the forewings 
have the black spots run together to form a very irregular trans- 
verse band, no remnants of black lunules on the hindwnigs, and 
no trace of silver at the apex of wing; on the underside of the 
hindwings the basal silver spots are united radially into three large 
silver blotches, the middle transverse row of silver spots are completely 
suppressed, and the silver lunules of the outer margin are more or less 
extended basally into streaks, with only a slight indication of black 
scaling to the outer edge of these last silver spots.” 
