9 
proved to be a storm petrel.” Thus now, a.s in the days of Gilbert 
White, the knotty point as to whether or no there are not some 
swallows which do not actually migrate at all, is occasionally 
discussed ; and what the Selbornian Naturalist wrote an hundred 
years ago is still applicable in our day ; — 
“ Amusive birds— say, where your hid retreat 
When the frost rages and the temi)est beat I 
Whence your return,— by such nice instinct led 
When spring’s soft season lifts her blooming head ? 
Such baffled searches mock man’s prying pride, 
The God of Nature is your secret guide.” 
In Entomology j\lr. Barrett has been, as usual, the chief con- 
tributor. A paper on the Camberwell beauty butterfly was read 
by this gentleman at the September meeting. ^Ir. Barrett mentioned 
that the first of these butterflies Avhich appears to have been 
observed in Norfolk was in IVlay, 1839, near Norwich; jind that 
during the past year a large number had been seen in different 
parts of the county, especially in the vicinity of Sherringham. 
In the discussion which followed Mr. Barrett’s paper, it appeared 
to be the opinion of the Entomologists present, that the sudden and 
irregidar appearances of these butterflies are to be attributed to 
some peculiarity in the season favouring their development — that 
the eggs may remain dormant until such circumstances occur — and 
that sound, perfect insects are doubtless to be found everv year 
which continue the race — but that their occurrence in numbers is 
owing to clhnatic influence, and certainly not to immigration. 
^Ir. Barrett exhibited at the July meeting a magnificent collec- 
tion of Nocturnal Lepidoptera collected during this season ; and 
IMr. Bridgman exhibited three specimens of the leaf-cutting bee, 
ami made some remarks on their habits and economy apropos of 
a specimen of their craft shown by ]\Ir. Fitch, which consisted of 
a piece of board taken from the roof of East Harling Church 
containing the cell borings of this insect. 
In September, Mr, Bridgman exhibited a bee's nest (of the 
species Anthophora acervonim) formed of clay, found by him 
in a bank near Norwich ; he showed the perfect male and female 
