66 
THE WEEKLY ENTOMOLOGIST. 
criterion of what it might do if cir- 
cumstances required. There is no 
difficulty whatever in imagining P. 
Bceticus or any other Butterfly or 
moth under the sun, starting on a 
journey from Calais to Dover; the 
only difficulty that requires explana- 
tion, is the question, how did our 
traveller accomplish his journey in 
safety ? Did he do it by stages, or 
all at once ? If by stages where did 
he put up ? Mr. Mathews does not 
tell us whether the Lepidoptera and 
“ minute black Diptera” which he 
saw off Portland Bill ever arrived at 
their destination, if destination they 
had. Three courses are obviously 
open to an insect, who wishes to visit 
our coast from Prance. He may cither 
keep on the wing the whole way, or 
he may get a “ lift” in a vessel, or 
he may vary the monotony of his 
voyage by swimming. This latter 
mode of proceeding however is in the 
least degree compatible with the 
habits of an insect unused to the 
water, as may be easily believed by 
those who have witnessed the unhappy 
state of a fly in a milk-jug : or seen 
the floating carcases of moths in a 
cistern. One more question and we 
have done. How comes it, that local 
insects in one part of England are so 
seldom blown to another ? Oqr space 
prevents us from enlarging further on 
this subject, but our remarks arc 
intended to invito discussion. 
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OBSERVATIONS. 
./ disembodied Moth . — In numbers 
ol the Entomologist, l was reminded 
by an interesting and amusing letter 
from a correspondent entitled a “ de- 
capitated moth, of a circumstance 
