332 
WILD NORWAY. 
June 4th.—Outward-bound to Denmark. We passed 
a “ tinner ” whale fifty miles east of Tyne, and had the 
company of two Willow-Wrens and a Garden-Warbler ; 
some Swifts also were reported seen. The incident of 
this voyage, however, was an extraordinary insect- 
migration observed from about two hundred knots out 
from Tyne ( = about a hundred from the Jutland coast). 
About 2 p.m. I noticed a few moths fluttering about 
the. companion-way, and soon after very large numbers, 
of which I caught three, which proved to be Bupalus 
piniarius , the bordered white. The course of the 
Koldinghuus was presently crowded with hosts of 
moths, which skimmed along the sea or rose in clouds 
from its surface, on which millions more lay dead. 
Half an hour later, larger corpses were observed, includ¬ 
ing, as far as one could see from the bows, some of the 
Sphingidse, a few Digit era, and many dragon-flies. In 
connection w T ith the last-named, it was a curious 
coincidence that, on the eve of sailing (June 2nd), I had 
noticed in my garden at Eoker a large dragon-fly, 
which, I now concluded, was a survivor of these 
adventurous Danish emigrants. The sea continued 
strewn with myriad relics of overwhelmed hosts all 
that afternoon, and, though in decreasing numbers, till 
within fifty miles of the Danish coast. There was at the 
time only a light air from the east, but a strong ground- 
swell indicated a previous breeze from that quarter. 
While on the subject of the transit of moths, etc., 
across the North Sea, the following note is pertinent. 
During the autumn of 1891 the north-eastern counties 
were infested by a perfect plague of caterpillars, which 
ravaged the turnip-fields, leaving nothing of the leaves 
