xlv 



tastes which he thenceforth manifested. After liis return he 

 prepared for a longer expedition ; and for two years he travelled 

 over La Plata, Uruguay, and the Brazilian Provinces of Eio 

 Janeiro and Minas Geraes. Not j'^et satisfied with his explora- 

 tions of this part of South America, he visited it a third time, 

 and traversed the continent, from Santiago, in Chili, to Monte 

 Video. He returned to France in 1830, and published his fu'st 

 scientific essay, " On the habits of the Coleoptera of South 

 America." In the same year he went again to South America, 

 this time to the warmer and more luxuriant region of Cayenne, 

 where he spent nearly two j^ears. On his return he published his 

 account of the habits of the Diurnal Lepidoptera and Coleoptera 

 of Cayenne, and several descriptive papers in the Revue des Deux 

 Mondes and other periodicals, which is all that he has given the 

 world of his travels and adventures. He appears now to have 

 devoted himself ardently to the systematic study of the insects 

 he had collected, and in 1834 brought out the first volume of his 

 'Introduction to Entomology.' In 1835 he was made Professor 

 of Zoology at the University of Liege, a position which he 

 occupied for thirty-five years. He was married in 1834, and 

 had four children, two sons and two daughters. He died on 

 July 18th, 1870, at the age of sixty-nine, and was buried at 

 Eosieres, in the department of the Somme. 



Besides his great work, the ' Genera des Coleopteres,' which 

 occupied the last twenty-two years of his life, and with which his 

 name will be associated as long as Entomology is studied, he 

 published a Monograph of the Erotylidse, a Revision of the 

 Cicindelidse, a Monograph of Ph3^tophaga, and the first volume 

 of an Entomological Fauna of the environs of Paris ; also 

 several essays, — on Instinct and Intelligence, — on Species, their 

 permanence and variations, — and an inaugural address on 

 Geographical Distribution, besides a few others of less im- 

 portance. 



The unanimous verdict of entomologists has already stamped 

 the 'Genera des Coleopteres' as a work of transcendent merit 

 and usefulness ; and when we consider that almost every line of 

 its nine closely-printed volumes embodies the result of numerous 

 observations, careful comparisons, and weU-considered judgments 

 upon other men's work, we niaj' form some notion of the mental 

 and physical ]Dower required to produce it, volume after volume, 



