PROCEEDINGS. 



XV 



rican blight. The specimen is further interesting, from 

 showing that results, apparently identical, occur from wounds 

 inflicted, whether by the proboscis or ovipositor of insects. 

 Many instances are recorded of large woody galls being 

 found on different trees : the large root-galls of the Oak 

 and Elm, caused by the deposition of the eggs of one of the 

 Cynipids (see ' Gardener's Chronicle,' 1841, p. 732) ; the 

 hard woody galls of the Willow, caused by a minute midge ; 

 and the galls of the Thistle, produced by Tephritis Cardui, 

 are instances in which insects of different orders are found 

 to be capable of causing the growth of hard woody masses ; 

 but in all these cases the effect is produced in order to afford 

 a place of safety for the eggs, and the supply of a sufficient 

 mass of food for the young insects when hatched ; but in the 

 instance before us the mass of matter is for the latter object 

 only, and it is this kind of excrescence which Rennie, in 

 his ' Insect Architecture/ has termed pseudo-galls, giving 

 several examples obtained from different trees, some of 

 which, however, may have been the result of disease in the 

 plants, independent of the attacks of insects. The numerous 

 minute aphids now on the branches of the Pear-tree in 

 question may be destroyed by hot water, or by washing the 

 branches with the oily mixture used in killing the American 

 blight. One very curious circumstance attending this attack 

 is, that the aphids in question have confined themselves to 

 the Nelis d'Hiver, and have touched no other Pear tree in 

 Mr. "Wilmot's extensive grounds." 



Novelties from the Society's Garden. Abronia umbel- 

 lata, a plant requiring nearly the same kind of treatment as 

 a Verbena. 



Books Presented. 



Hooker's Journal of Botany and Kew Garden Miscellany. No. 12. From Sir W. 

 Hooker. 



The Quarterly Journal of the Geological Society. No. 20. From the Society. 



January 15, 1850. (Regent Street.) 



Awards. Certificate of Merit : To Mr. Davis, of Oak Hill, 

 East Barnet, for three dishes of West's St. Peter's Grape, 

 well coloured, plump, and finely bloomed. 



Miscellaneous Subjects of Exhibition. An unnamed 

 Odontoglossum, apparently O. maxillare, from Messrs. 

 Jackson, of Kingston. A variety of Chorozema cordatum, 

 not very showy, and called flavum, from Mr. Henderson, 

 of the Wellington Road Nursery, St. John's Wood. Two 



