WIESIDEKT' ADDRMfi. 



probable, but i* hardly so well established, that return 

 migrations take place in the spring of the progeny of the 

 swarm of the previous summer. They are much influenced in 

 their speed by the wind, and sometimes fly at a great height. 



With regard to the perishing of the swarms of locusts in the 

 sea, it is interesting to note that locusts hare been taken at sea 

 at great distances from land, both singly and in numbers, so 

 that the being blown out to sea is not always immediately fatal 

 to them. Some of these records are as follows ; On November 

 2 ist, 1811, when the ship Georgia was 200 miles from the 

 Canary Islands, the nearest land, an innumerable quantity of 

 locusts alighted on the vessel, and many more fell into the sea* 

 This continued for an hour. On September ijth, 1*30, the 

 Levant encountered a severe gale in iSdcgs, N, Lat,, the nearest 

 land being 450 miles distant, and was surrounded by large 

 swarms of locusts during two days, which settled in numbers 

 on the ship. Two days afterwards it sailed through masses of 

 them in the water, Darwin states that a large species of 

 A'.ndium few on board the Beagle when the nearest point of 

 land, not directly opposed to the trade'Wind, was 370 miles 

 distant, and Scudder crowns the series by recording that on 

 November 2nd, 1865, a ship between Bordeaux and Boston 

 continued to pass through a swarm of Sthitloctrca pmgrina. far 

 two days, when 1,200 miles from the nearest land. When we 

 read of the falling of dust at sea in quite appreciable quantities, 

 we cannot but feel that the wind, which can transport coarse 

 dust and stones larger than one-thousandth part of an inch 

 square for 300 miles or more, may well carry a swarm of locusts 

 or butterflies or other insects, which to a certain extent support 

 themselves in the air, to these distances, Darwin, in "Voyage 



the Beagle," in speaking of these falls, says ; " The dust foils 



such quantities as to dirty everything on board and to hurt 

 *s eye*," and mentions the occurrence of the minute 

 referred to above, also stating that dust has been known 



travel in this way 1,000 and 1,600 miles. The travelling of 



