THE WEEKLY ENTOMOLOGIST. 
125 
“ lo. Common. The larva feeds 
in great numbers on nettles in July. 
“ Antiopa. Yery rare. I have 
seen two here, but am sorry to say 
that, through over eagerness I missed 
one of them. It was settled on the 
flower of Wild Scabious. Mr. R. P. 
Harvie informs me that, in 1861, 
when in pursuit of Edusa, he was 
astonished to see Antiopa, which he 
first took tc#be Atalanta, but found 
out his mistake too late to remedy it. 
V. Polychloros. Hot common. 
Taken at Eickleigh Yale, and at 
Maristowe. 
“ Ur ticca. Yery common. Imago, 
larva, and pupa all at one time. 
Common everywhere. 
A. Paphia. Common in Bickleigh 
Woods in July and August. 
“ Adippe. Common in the Wood- 
land Meadows at Bickleigh. , 
To be cotinuned. 
Immigration of insects. — One, at 
least, of the uses of such a publication 
as the “ Entomologist” should be, — 
by the free exchange of opinion and 
information, — to endeavour to set at 
rest doubtful questions in connexion 
with the Science. I venture there- 
fore, — all inexperienced as I am, — 
to refer to the subject of the immi- 
gration of insects, — which has ap- 
peared in your pages. 
Without venturing to offer an 
opinion, whether the species named 
were British born subjects or not, I 
must observe that Mr. Gregson’s 
arguments as expressed in his letter 
published in your 11th. number, 
seem to me to be inconclusive. 
One of his objections to the idea of 
Immigration, is the difficulty of in- 
sects seeing one coast, from the other. 
Are we aware what power of vision 
insects have? And may they not 
possess that 6ense to an extent far 
beyond our comprehension ? Is it 
necessary, too, that they should see 
the object they wish to visit? We 
are told of male moths flocking for 
miles distant, and crowding round a 
box containing a female which they 
cannot see. May not the same mys- 
terious power that guided them to 
her, lead them to any other distant 
object that they may wish to visit ? 
The inability of insects to take so 
long a flight seems to me to be equally 
inconclusive. I have heard several 
well authenticated instances of insects 
taking much longer flights than would 
be necessary to take them across the 
Channel. One was mentioned to me 
by Mr. Smith, of the British Museum 
as reported to him by an army officer, 
of a cloud of Cardui which he saw in 
the North of India, and which took 
a half day to pass over the encamp- 
ment of the British Army, with which 
he was. Did this Cardui fly no long- 
er than that half day, they would 
have gone a long distance. Again, 
the late Mr. Curtis told me that Pro- 
fessor Darwin showed him an insect, 
or insects, that flew on board the 
“ Beagle” surveying ship, when more 
than twenty miles distant from the 
Coast of South America. The width 
of the British Channel, then, is not 
