94 



Cliapmant Esq. ; also some singular galls, found on a species of oak at Tschl, in 

 Austria, the trees growing at an elevation of from 2000 to 3000 feel above the level of 

 the sea. These galls were considered by Mr. Westwood to be the production of some 

 dipterous insect. 



Dr. Gray also exhibited some specimens of a new species of gall lately found in 

 Kent, and made the following communication respecting ihem: — 



" On a wild rose {Rosa canina) in a hedge near West Wickham, in Kent, Miss 

 Stanely, with whom I was walking, observed a kind of gall which I cannot find 

 noticed in any of the works to which I have access. Many more specimens were 

 afterwards collected, and my friend made a series of drawings of their different forms, 

 which were exhibited to the Society. In its perfect stale the gall is a globe, from one- 

 fourth to three-eighths of an inch in diameter ; the upper surface is rather flattened, and 

 surrounded with some elongated, tapering, acute spines, generally rather shorter than 

 the diameter of the body of the gall. In the youngest state the spines are much longer 

 and stouter in comparison with the size of the body of the gall. The number of 

 spines varies considerably ; the normal number appears to be six, but galls are! often 

 found with only two, three, four or five, and more rarely with seven or eight; in ge- 

 neral the spines are simply awl-sbaped, but they are sometimes divided at the top into 

 two or even three small points. The galls are generally attached to the under surface 

 of the leaflets ; sometimes two or three are clustered on one leaflet ; they are also some- 

 times found on the foot-stalk of the leaf or of the leaflet. On putting some of the 

 galls into a box with a glass cover, the larvae developed themselves, and no less than 

 three species of the genus Eurytoma were emitted, which Mr. Walker has kindly 

 determined to be E. sethiops, E. plumata and E. gracilis. It is doubtful if these are 

 not the parasites of the former, rather than the former of the galls." 



Mr. Wollaslon exhibited some specimens of Chrysomela cerealis from Snowdon, 

 and called attention to the under wings of this species, which are of a beautiful pink 

 colour. He observed that the under wings in Coleoptera had hitherto been much neg- 

 lected, but often aff"orded good characters in the discrimination of species. 



Mr. Stevens exhibited some Coleoptera and Lepidoptera sent from Moreton Bay, 

 by Mr. Diggles, amongst which were the sexes of Eurycus Cressida, Cezara Ardeniae, 

 Cacostomus squamosus, Figulos Lilliputanos, and some beautiful species of Bomby- 

 cidse. Mr. Stevens also exhibited some Coleoptera sent from Delagorge Bay by Mr. 

 K. W. Plant, including Cacosceles (Edipus, Dicronorrhina Derbyana, &c. 



The Rev. H. Clark exhibited a species of Hydroporus apparently new to this 

 country, and a new species of Agabus, ^for which he proposed the specific name of 

 sexuaris. 



Mr. Smith exhibited a nest of Pelopa;us, from Virginia, tenanted by two distinct 

 species, viz., P. cyaneus, Linn., and P. flavipes, Fab. 



Mr. Yatman observed that he had noticed in New Jersey that different species of 

 this genus inhabited the same holes. 



Mr. Westwood read some extracts from a letter received by him from Mr. Brodie, 

 on fossil insects lately found in the tertiary formations in the neighbourhood of 

 Stevenage. 



