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love of Natural History, he followed that eminent person to England 

 in 1818, and soon after was made Keeper of the Museum of the East 

 India Company, which charge he held till his death, which took 

 place on the 24th of July, 1859, in the 87th year of his age. 



Whilst in the East, Dr. Horsfield diligently collected the plants 

 of Java and the adjacent islands ; and the folio volume afterwards 

 published in this country, under the title of Plantse Javanicee Ra- 

 riores,' contains figures of selected species from his collections, with 

 descriptions furnished by his friends Mr. J. J. Bennett and the late 

 Mr. Robert Brown. During his stay in Java also, he contributed 

 various papers on the Geology and Natural History of the Eastern 

 Islands to the * Transactions of the Batavian Society,' of which he 

 was a member. The same collection also contains a very interesting 

 experimental inquiry, by Dr. Horsfield, on the physiological action 

 of the Upas Antiar poison, the juice of a tree which was afterwards 

 figured and described in the ' Plantse Javanicse.' His writings on 

 Zoology are, chiefly, his 'Zoological Researches in Java,' 4to, 1821 ; 

 the valuable Catalogues of the several zoological departments of the 

 East India Company's Museum, and numerous papers on zoological 

 subjects contributed to the ' Linnean Transactions,' the ' Zoological 

 Journal,' and the ' Proceedings of the Zoological Society.' His latest 

 publication is the c Catalogue of the Lepidopterous Insects in the East 

 India Museum,' of which only the first volume has appeared ; it was 

 compiled by Mr. Moore, his assistant, from Dr. Horsfield's materials 

 and manuscripts, and under his direction. Dr. Horsfield had some 

 years before commenced a Catalogue of these insects, of which only 

 two parts were published (1828-29); and this publication, though 

 incomplete, deserves notice, as containing an elaborate Introduction, 

 with a general arrangement of the Lepidoptera founded on their 

 metamorphoses. The importance of the transformations of insects in 

 reference to their classification had indeed become early impressed on 

 Dr. Horsfield's mind, and he accordingly spent three seasons during 

 his stay in Java in collecting the larvae of numerous species of Lepi- 

 doptera, watching their development, and making careful descrip- 

 tions and drawings of their successive changes up to the perfect 

 state. 



Dr. Horsfield was a member of various learned societies at home 

 and abroad. He was elected a Fellow of the Linnean Society in 



