Proceedinfix. 77 



seam 2 ft. 3 in. in thickness. The aggregate thickness of the 

 seven seams is 14 ft. 6 in. 



Mr. James B. Crosfield mentioned that during the late 

 frost hundreds of Gulls frequented the Thames up to Waterloo 

 Bridge. Those he was able to identify were Black-headed. 



Evening Meeting. — Febeuaby 26th, 1892. 



The company of young people was specially invited. 



Mr. Fred. Enock gave a popular lecture illustrated by 

 admirable lantern slides on ' The Hessian Fly.' 



Mr. Enock gave a most careful and minute account of the 

 life-history of the Hessian Fly, an insect which has been 

 known in America for 150 years, but only made its appearance 

 in England about six years ago. Its ravages in fields of 

 barley in America are most serious. In our country, owing 

 to climatic causes, it does not seem likely to be nearly so 

 dangerous a foe to the farmers, though it does much damage. 



Mr. Enock showed on the screen diagrams of the fly in all 

 stages. The female fly deposits her eggs in the stem of the 

 barley. The larva turns itself within the sheath of barley by 

 means of beautifully adapted knotched organs, and at each 

 stage exhibits most exquisite adaptations to its surroundings. 



Evening Meeting. — March 18th, 1892. 



The following presentations were made : — ' Transactions of 

 the Burton-on-Trent Nat. Hist, and Archaeological Society, 

 1892.' ' Report and Proceedings of the Belfast Nat. Hist, 

 and Philosophical Society, 1890 — 1891.' ' Transactions and 

 Journal of Proceedings of the Dumfriesshire and Galloway 

 Nat. Hist, and Antiquarian Society, 1890—1891.' Tun- 

 bridge Wells Nat. Hist, and Philosophical Society, * Annual 

 Report ' for the year ending 30th of September, 1891. 



