22. TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 
entomologists whose observations were restricted to the 
Southern and South Hastern coasts and perhaps natur- 
ally they found in migration from the Continent an 
explanation for the sudden appearance of the species there. 
The moths they say came over from an indefinite some- 
where during the June and July of that year and the 
numbers of larve found during the autumn were simply 
the offspring of those insects, doomed to swift extirpation 
in a climate fatal to their development. To such a view 
as this most of our leading London Lepidopterists seem - 
now to adhere. That veteran entomologist for instance 
Mr. C. W. Dale, F.E.S., of Glanvilles Wotton, in an 
exhaustive account of the British Sphingide now being 
issued in serial form, after mentioning the various localities 
where on its last appearance Devlephila galw was recorded, 
thus sums up the case. ‘‘ This I think goes to prove 
(referring to the fact that the imsects were specially 
numerous on the South East Coast) that the migration 
came not from France but from Belgium and Holland, 
the route followed by Antiopa (a butterfly assumed to be 
a migrant). Those finding congenial quarters on the 
coast of Kent stayed there, while those which arrived in 
Yorkshire mostly went on to the coasts of Lancashire and 
Cheshire and perished soon after laying their eggs.” And 
again finally thus—‘‘ The only years in which it has been 
common are 1834, 1859, 1870, and 1888, and owing to our 
inclement autumns it seems unable to propagate its 
species in the British Islands for any length of time.” 
The inference clearly is that gal is not strictly speak- 
ing a British moth at all and that those individuals who 
are ever seen here are either immigrants from the Con- 
tinent or the immediate descendants of immigrants. 
Dr. Corbett of Doncaster, says ‘‘ When the case of such 
an insect as galw is considered, I think that most prob- 
