EXTRACTS FROM FOREIGN PERIODICALS. SIT 



termination. — Mr. Bainbridge exhibited a small Moth which had been very- 

 injurious to Apple-trees in the neighbourhood of Lambeth, in many cases the 

 leaves having been destroyed altogether. The cocoons are formed on the 

 leaves, which soon become covered with webs so strong, that in many cases the 

 young leaves cannot burst through ; but the larger leaves of Apple trees escape,, 

 and Pear trees are but rarely attacked. — Mr. Westwood detailed an entomolo- 

 gical visit lately made to Paris, and, amongst other subjects, introduced to notice 

 a disease with which Silk-worms have been very extensively attacked in France,, 

 called Muscadine. The malady is a parasite, which gradually envelops the 

 whole body in a white Fungus, and destroys the Silk-worm, the mischief being 

 produced by the explosion of a Fungus which is taken in by the spiracles or 

 pores of the skin, as has been proved by M. Adouin, who has inoculated se- 

 veral Worms and Beetles with it. There was also a specimen of the Scolytus 

 pigmceus, an insect which attacks the Oak, and which has latterly proved so- 

 destructive that 80,000 trees in the Bois de Vincennes have been cut down 

 through its attacks. Mr. Westwood, in conclusion, made some remarks on the 

 progress of Entomology in France, which he stated to be in advance of this coun- 

 try, there being more working collectors, and the collection at the Jardin des- 

 Plantes being superior to that of the British Museum ; M. Adouin having like- 

 wise just completed a course of fifty lectures on Entomology. With this esta- 

 blishment also are connected five persons devoted to Entomology, whilst in the- 

 British Museum there is only one. 



EXTRACTS FROM THE FOREIGN PERIODICALS. 



ZOOLOGY. 



I. On the Migrations of North American Birds. — We now present our 

 readers with such portions of the Rev. Mr, Bachman's instructive paper as- - 

 we were compelled to omit last month. 



A great number of American birds of passage do not at all traverse Carolina, 

 but proceed to the West Indies across the Gulf of Mexico. Others follow the 

 direction of the Alleghanies, and thus pass to Mexico, or even to still more 

 southerly countries. 



It has been supposed, that some migratory birds, in quitting the United States, 

 may pass the tropics, and find, towards the south pole, climates analogous to 

 those which they have quitted in the north, which enable them to build a 

 second time. Such is known to be the case with the Stork of Europe, which 

 rears a second brood in Africa. 



No. 12, Vol. II. 2 v 



