XVI PROCEEDINGS OF THE 



He also exhibited some specimens of a minute species of Podii- 

 ridce, remarkable for not possessing the power of leaping. Like- 

 wise specimens of apple bloom destroyed by the larva of the 

 apple weevil Balanimis pomoru7n, the pupa of which still remained 

 within the dead bloom. 



Also specimens illustrative of the natural history of a minute 

 species of Cecidomyia, which burrows into the twigs of willows, 

 destroying them for practical purposes. Also specimens of a 

 minute parasitic Platygaster by which they are attacked, and a 

 drawing by Mr. Ingpen of the singular scales with which their limbs 

 are entirely covered ; by whom also it was stated that the willows 

 are occasionally attacked by a species o^ Cecidomyia which produces 

 large woody galls : and that the original potatoes imported from 

 Peru had been found to be as liable to the prevailing disease as 

 the common sorts. 



Mr. Westwood also exhibited living specimens of the larva and 

 pupa of the rare Ctenophora atrata, accompanied by the reading 

 of a letter from Mr. Weaver, by whom they had been discovered 

 at Kinlock Rannock, in Perthshire, and by whom also several 

 specimens of Lamia cedilis had been captured. 



A description of C/ieirotonus Pavrii by J. E. Gray, Esq., was 

 read. 



Mr. Spence communicated some observations on CJwlura 

 terebrans, a small crustaceous animal which attacks the wood of 

 submarine erections, as described in the last number of the Annals 

 of Natural History, and suggested whether it may not be a dis- 

 tinct species ; likewise on some particulars stated by Sir J. Rennie. 



He also communicated an extract from the London Medical 

 Gazette, No. 108, N. S., p. 904, in which it was stated by Mr. E. 

 Stanley, M.R.C.V.S., that the larva of Helophilns pendulus had 

 been found lying upon the spinal sheath of a cart horse, which 

 appeared to have injured its spine, attended with partial paralysis 

 and occasionally with acute pain; subsequent to which the horse 

 had been seized with violent trembling of the limbs, profuse 

 perspiration, and other acute symptoms, which had produced its 

 death, when the spinal sheath was found to be inflamed with ex- 

 travasation of blood about the lumbar and posterior portion of the 

 dorsal region from twelve to eighteen inches in length, accom- 

 panied by one of the above mentioned larvae. 



Colonel Hearsey stated that he had heard of insects having 

 been taken from the spinal marrow of horses in India by Mr. 

 Morecraft, and which had previously produced paralysis in the 

 hind limbs. 



