384 Entomological Society of London. 



the orbit of the fourth satellite, the difference will become more con- 

 spicuous in observations when Jupiter is near the solstitial colure, and 

 the true mass of Jupiter will be greater than that obtained even by the 

 present determination. I believe, however, that the difference is due 

 entirely to the small errors which cannot be eliminated, even from 

 the mean of many observations." 



III. Observations of the Transit of Mercury over the Sun's Disc, 

 in May 1832 ; and of the Comet of Encke in June 1832 : at Buenos 

 Ayres. By M. Mossotti. 



IV. Transits of the Moon with Moon-culminating Stars, observed 

 at Cambridge Observatory in the months of January and February 

 1834. Lons;. 23 s, 54 east'of Greenwich. 



ENTOMOLOGICAL SOCIETY OF LONDON. 



This Society, established during the last year, which already in- 

 cludes in its list of Members nearly all the principal cultivators of 

 the science of Entomology in Great Britain, holds its meetings on 

 the first Monday in every month, at its Rooms, No. 17, Old Bond 

 Street. The subjects which during the present year have occupied 

 the attention of this Society have possessed not only much entomo- 

 logical but also considerable practical utility and interest. 



At the meeting in January, among others a paper was read entitled 

 " Explanation of the sudden Appearance of the web-spinning Blight 

 of the Apple, Hawthorn, &c," by Mr. Lewis, who stated that the grubs 

 composing this blight, which makes its appearance in the spring, had 

 been hatched at the commencement of the preceding winter, but had 

 remained under a glutinous cover, formed by the female parent as a 

 case for her eggs, until the young brood had attained some size. 



At the February meeting the subject of mummy insects formed 

 part of the proceedings, in which Mr. Pettigrew took part. 



At the meeting in March, Captains Ross and James C. Ross being 

 present, the arctic insects brought home by those gentlemen were 

 exhibited, as well as those collected by the late Captain Lyon, some 

 of which formed the subject of a paper by Mr. Westwood. 



April 7. — At this meeting the following papers were read: — "A 

 Memoir upon the Habits of various Species of Indian Insects," by W. 

 W. Saunders, Esq., F.L.S., &c. " Observations on a mode practised 

 in Italy of excluding the common House-fly from Apartments," by 

 Wm. Spence, Esq., F.L.S., &c. In this paper, which had reference to 

 the instinctive powers of insects, it was stated that the mode of ex- 

 clusion in question consisted of fixing netting across the open window- 

 frames ; but that even when the meshes were more than an inch in 

 diameter, the flies instinctively were prevented from enteringtherooms. 

 A portion of a "Memoir upon Insects found in Gums and Amber," 

 by the Rev. F. W. Hope, F.L.S., &c, in which the author entered 

 fully into the subject of the general properties of various gums, no- 

 ticing the common error of mistaking the gum anime for copal, which 

 latter he stated was never found to contain insects. This statement 

 was confirmed by Dr. Ure, who was present, and who stated, that af 



