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brassiccs, L., P. rapce, L., Vanessa cardui, L., Plusia gamma, 

 L., Nomophila noctiiella, Schifif., and many other species have 

 been noted in greater or less numbers under similar circum- 

 stances. Leucoma salicis, L., was in 1878 observed many miles 

 at sea off Harwich, at which place they subsequently appeared 

 in thousands, and were seen resting on the fronts of buildings 

 facing the sea in hundreds on the day of their arrival {E.M.M. 

 xi. 269). Then we have the reports furnished by the keepers 

 of various lighthouses and light-vessels, to the committee 

 appointed by the British Association for the Advancement 

 of Science, for the purpose of obtaining information on the 

 migration of birds. Although the avowed work of this 

 committee deals only with birds, sundry reports upon insects 

 have been furnished through the courtesy of their secretary, 

 Mr. Cordeaux ; and although those referring to lepidoptera 

 are not numerous, their importance cannot be over-estimated ; 

 they are to the following effect : 



Hanois Lighthouse, to the west of Guernsey, the extreme 

 westerly point of the Channel Islands, in a direct line between 

 the N.W. coast of France and the S.W. coast of England; 

 '•' 1882, June and July flights of Plusia gamma, L." " 1883, 

 September 13th. Wind S.E. Sky cloudy. Silver gamma 

 moth all evening round lantern." " 1886, October 31st, 

 8 p.m. A quantity of silver-gamma moths, also a few 

 brown ones, but smaller than tlie gamma." 



Fastnet Lighthouse, eight miles out at sea, on the coast of 

 County Cork. " 1883, November 2nd. Weather hazy. 

 Number of large moths, comparable only to a fall of snow." 



Rhymes of Lslay Lighthouse. Situated on a rock off the 

 south-westerly point of one of the west Scottish islands, and 

 due north of Ireland, whence it is distant some thirty miles. 

 " 1885, night of September 7th, hundreds of moths flying 

 about lantern." 



Heligoland Lighthouse, on the east point of the island 

 facing Denmark, which is the nearest mainland, and distant 

 about thirty miles from it. " 1883, August 6tli to 7th, 

 wind S.E., considerable flight of silver-gamma moth {Plusia 

 gamma, L.), but nothing compared with the perfect " snow- 

 storm of this moth that passed in the autuam of 1882, all 

 going west." " October nth, wind S.S.W., there was a large- 

 flight of Hybcrnia defoliaria, Clerck., mixed with H. auran- 

 tiaria, Esp. ; and also during the nights of the last week in 

 October repeated flights of these moths." " 1884, night of 

 July 2nd to 3rd, thousands of Plusia gamma, L.," " night 

 2ist to 22nd, great numbers of Bombyx neushia, L., east to 



