IxXXViii PEOCEEDINGS OF THE 



of North America, published by the Smithsonian Institution, added 

 considerable value to Mr. Walker's work. 



Not content with the study of Diptera, Mr. Haliday devoted much 

 labour to the classification of the minute parasitic Hymenoptera 

 belonging to the Chalcididce, Proctotrupidoe, &c. <fec. His arrange- 

 ment of the order Thysanoptera in the 3rd and 4th volumes of the 

 • Entomological Magazine ' shows how thoroughly and exhaustively 

 he investigated the most difficult groups of insects. About the year 

 1860, Mr. Haliday's health became uncertain; severe dyspeptic 

 attacks reacted upon the nervous system, and occasioned periods of 

 apathetic melancholy which he could not shake off, and which ren- 

 dered all work impossible during their continuance, notwithstanding 

 that his mental powers remained unimpaired. He sought the more 

 joyous climate of Italy, and took up his residence with his relative. 

 Signer Pisani, near Lucca. Here he devoted himself to collecting • 

 and studying Italian insects, and to recording the habits of those in- 

 jurious to the cultivations of that part of the country ; but his con- 

 tributions to Entomological literature were but few in his latter years. 

 In 1868 he visited Sicily, in company with his friend Dr. Perceval 

 Wright ; but the fatigues of this journey and the insalubrity of the 

 climate seemed to tell severely upon him. In the same year he took 

 a very active part in the formation of the Italian Entomological 

 Society. He was elected a Fellow of the Linnean Society on the 

 3rd February 1857, only a short time before the state of his health 

 necessitated comparative quiet from mental exertion. Having been 

 iU at Rome in the summer of 1869, although he recovered for a 

 time, another illness, in 1870, proved fatal. He died on the 12th of 

 July in that year, at the age of sixty-three. 



FEfiniKic Antoine Gtjillatjme MiauEL was born on the 24th of 

 October, 1811, at Neuenhaus, in Hanover. He received his early 

 education from his father, Dr. Miquel, and in the year 1829 went 

 as a student to the University of Groningen. WhUst a student he 

 became known as a botanist by his description of the Cryptogams 

 of the Netherlands, which appeared as the second part of C. H. 

 Van Hall's ' Flora of Northern Belgium.' He took his degree as 

 Doctor of Medicine in May 1833, and in November of the same year 

 he was appointed Hospital Physician at Amsterdam, and in 1835 was 

 nominated Lecturer on Botany in the Clinical School at Rotterdam. 

 Whilst in practice as a physician, he published the following works 

 on Botany : — 



' Monographia generis Melocacti,' ' Commentatio de vero Pipere 

 Cubeba' (1839), ' Observationes de Piperaceis et Melastomaceis ' 



