ENTOMOLOGICAL SOCIETY OF LONDON. 185 



larvas subsisted on the contents of the horse's stomach ; it was 

 his (Mr. Sell's) opinion that their food consisted of the fluids 

 of the vascular surface of the stomach itself; an opinion which 

 was strengthened by a fact communicated to him by an old 

 veterinary surgeon, in which a bot had actually eaten a hole 

 through the parietes of a horse's stomach, by which hole a 

 portion of its contents had escaped. He also believed Mr. 

 Clark was entirely in error in supposing that the presence of 

 bots was in any way beneficial to horses ; where very few in 

 number, they might probably be harmless, but where numerous, 

 he considered them excessively injurious. Mr. Westwood ex- 

 pressed his surprise that Mr. Clark should have supposed that 

 CEstrus Equi, &c. fed on vegetable, while he well knew that 

 other closely allied species, as (E. 0ms, Bovis, &c. fed on 

 animal matter ; the affinity of these species ought to have led 

 him to conclude that they were not likely to subsist on such 

 different kinds of food. 



Sitting of the 6th November, 1837. 



J. F. Stephens, Esq. President, in the Chair. 



The following donations were received, and thanks ordered 

 to be given to the several donors : — 



Rev. W. KiRBY. Fauna Boreali- Americana. (Part IV. 

 Insects.) Edited by himself. 



The Editor. Magazine of Natural History. New Series. 

 No. XI. 



The United Service Club. Catalogue of its Library and 

 Museum. 



The Editor. Athenaeum for October. 



Messrs. Villa, of Milan. Conulh de Coleopteris novis ac 

 rarioribus minusve cognitis Provincia} Norvarni. 



The Editor. Naturalist for October. 



Leeds Philosophical and Literary Society. The 

 Annual Report of that Society. 



The Author. Yarrell's British Birds, Nos. II. III. 



Mr. W. W. Saunders exhibited a box of insects from Mr. 

 Sydney Smith Saunders, a member of the Society, now resident 

 in Albania. It contained many interesting specimens. 



Mr. Bainbridge communicated a paper, giving an account 

 of the detection of Ptinus Hololeucus, in the warehouse of an 



no. II. VOL. v. B b 



