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it from the Laurus, or from the undescribed trees 

 growing in Sumatra or Borneo ? 



A few weeks ago Lord Stradbroke sent me a 

 couple of insects, wishing to know their name, as he 

 was apprehensive he should lose all his Scotch firs, 

 as they were sickly and dying in great numbers 

 every year. I had no difficulty in acquainting him 

 that the insect was the Sir ex Juvencus, which puts 

 me in mind, that many years ago I observed in Mr. 

 Port's garden plantations at Ham, in Derbyshire, 

 several fine young oaks were lying on the ground ; 

 and inquiring of the gardener the reason of their 

 being hewn down, he told me the hornets had bored 

 into them and destroyed them. I now conclude that 

 they were not hornets, but the Sirex Gigas, which 

 is more like a hornet than the Juvencus. 



In Mr. Lambert's splendid book I do not recol- 

 lect that the Sirexes are mentioned as the destroyers 

 of the Pinus sylvestris, — but Lord Stradbroke ha- 

 ving sent me some pieces of a pine-tree, I will send 

 them to the Linnaean Society if you think it would 

 be acceptable to them. 



Yours affectionately, 



T. G. Cullum. 



From Professor Hooker. 



Glasgow, November 30, 1824. 

 My dear Sir James, 

 I received only the latter end of last week your 

 valued letter from Edward Rigby ; and I take the 



