XX 
JOURNAL OF PROCEEDINGS. 
gardens. Mr. Saunders stated that he had taken it at Wands- 
worth. 
He also exhibited three species of Laraellicorn Beetles from the 
Collection of Sir Patrick Walker, belonging to the family Scara- 
bceidce , but constituting new genera, having all the characters of 
Scarcibcei, but furnished with two spurs to the intermediate tibiae. 
He also read an extract from a letter addressed to him by 
W. Spence, Esq., in which it is stated that the vermicles observed 
upon the pupae of Scolytus destructor , described in a former letter, 
belonged to the genus Vibrio , as now restricted by Ehrenberg, and 
that the elm-trees in the promenades of Dunkirk, Calais, and Bou- 
logne, were in a worse state, owing to the attacks of the Scolytus, than 
in the park at Brussels, although no one was aware of the cause, 
but attributed the destruction of the trees to the cold sea winds. 
The writer had attended a meeting of the directors of the museum 
and of the public authorities at Boulogne, and pointed out to them 
the measures which ought to be taken, if they desired to preserve 
the rest of their trees, fifty of the finest and some scores of the 
young ones being dead, or fast dying, for want of a little entomo- 
logical knowledge and timely care. From specimens of infected 
elms lately seen, he was inclined to think that the female Scolyti 
are six weeks or two months in eating out their galleries and laying 
their eggs. 
Mr. Westwood also called the attention of the Society to the 
great injury caused by the same insect to the elms in Kensington 
Gardens, a great number of which on the south side were com- 
pletely killed. The mischief was moreover rapidly spreading round 
London, and he was convinced that unless some strenuous steps 
were taken, the elms in our public parks, &c. would be completely 
destroyed. He was of opinion that the injury was entirely attri- 
butable to the Scolytus, and not to the soil, atmosphere, &c. 
Mr. Scales stated to the meeting that he had failed in his at- 
tempts to exclude the common house-fly from apartments by means 
of string nets ; the window of the apartment where the experiment 
was tried was towards the north-west, with a single window, and 
the meshes of the net were not so large as those of a cabbage-net ; 
there was no looking-glass opposite the window, and yet the flies 
lighted upon the strings, and crept through. 
Mr. Ashton noticed the connexion of the wings in Membracis 
cornuta during flight, the anterior hooking upon the posterior, 
thus affording an instance of another order besides the Lepidoptera 
and Ilymenoptera, in which the wings were connected together. 
