REPORTS OF MEETINGS 
171 
Lathyrus annuus and L. deem. Another interesting 
plant which has crossed the Atlantic and seems likely to 
stay is the American ragweed (Ambrosia artemisicefolia). 
I have seen it at Portishead, and on the light railway near 
Blagdon ; and it is similarly met with in the North of 
England, and in several continental countries where its 
mode of growth from slender underground stolons enables 
it to persist, even if fruit be not ripened. =» 
In some other parts of the Bristol district plants occur 
whose introduction is not so easily accounted for : — for 
example, the Limestone Polypody that has made a home in 
Saltford railway cutting ; and Leycesteria formosa in Shute 
Shelve Wood. 
However, many of these aliens endure but for a season. 
If annuals they may not ripen seed ; if perennials they may 
not survive the -winter cold ; or should they do so they are 
sooner or later crowded out from the soil by stronger native 
species — the grasses, docks and thistles of our waste 
lands. 
JAMES W. WHITE. 
ENTOMOLOGICAL SECTION 
D uring the year 1902 only two meetings were held 
by this section. 
March 12 (Annual Meeting). — After the usual business 
Mr. Charbonnier exhibited a parasitic dipteron Rhogas 
circumscriptus, one of the Braconidee, parasitic on the 
larvae of a Noctuid moth ; an ichneumon of the genus 
Colpomeria bred from Sesia tipuliformis ;|^also a rare bug, 
Ledra aurita, taken in Leigh Woods. 
Mr. Griffiths exhibited interesting specimens of Lepi- 
