456 Notices respecting New Books. 



these weevils will be found. Tliev can only be destroyed by 

 searching; for them, and killing c;icli individual when discovered. 

 The method which I have found the simplest and the most effec- 

 tual, is to tread the earth round tlie stem after it is dark, and to 

 place bits of slates, tiles, or small stones round it. In the morn- 

 ing, the weevils retreat under them, and may be picked up. 

 Cracks in the bark, the separations of branches, holes in the 

 \vall, and every cranny into which it is possible for the weevils 

 to enter, should be examined. Perhaps wrapping!; round the stem, 

 a little tow soaked with some adhesive composition, such as the 

 basilicon ointment of apothecaries, may have the effect of ar- 

 resting these insects, when they attempt to ascend the stems of 

 the trees. 



The CurcuUo abietis was detected once on a vine. This is a 

 considerably larger weevil than the vastalor, and is one of those 

 with a lengthened snout. If gardeners will take the trouble, 

 occasionally, to look over their trees and bushes in the night- 

 time, many nocturnal depredators, and their haunts, may be 

 discovered, which are at present little suspected. It would be of 

 importance, when any new enemy is discovered, that it should 

 be sent to you, with an account of the manner in which it in'- 

 flicts injury, of the particular parts of the plant which it at^ 

 tacks, and of such other circumstances as may be known con- 

 cerning it. — I. 



A member of this Society, Mr. John Linning, has informed 

 me, that he has found a little oil put on the stems of carnations, 

 very effectual in protecting them from the attacks of earwigs. 



As this defence is always at hand, and may be easily made 

 use of, horticulturists and florists will, I hope, repeat and ex- 

 tend the experiments which have been made. 



The oil which I used was common fish-oil. Whale-oil of the 

 coarsest kind will answer equally well ; and indeed any greasy 

 substance. No more should be put on than will just produce a 

 shining surface. 



LXXIV. Notices respecting New Books, 



Philosophical Transactions of the Royal Society of London, for 



1819. Parts II. and III. 



Xh e following are the titles of the papers contained in these 

 additional Parts of tiie Transactions of the Royal Society for tlie 

 present year ; — On tlie Specific Gravitv and Temperature of Sea 

 Waters in different Parts of the Ocean and in particular Seas, 

 with some Account of their Saline Contents. By Alex. Marcet, 

 M.D. — A» Account of the Fossil Skeleton of the Proteo Saurss, 



