6 BEVIEW OF LITEBATUBE. 



successively enriched with numerous Diptera from different' regions. 

 His elucidations about the typical species of Fabricius are of great 

 value ; bis descriptions and figures (the lattei- drawn by Meigen) 

 are generally satisfactory and enable us to recognize the objects. 

 Moreover many types of Wiedemann's species are still preserved in 

 difterent museums , especially in that of "Vienna, which contains the 

 ancient collections of von Wintliem and Wiedemann himself, and 

 where, in doubtful cases, elucidations may be obtained. 



Among the special Dipterologists must further be mentioned 

 J. Macquart. He commenced with the study of only indigene forms 

 and published (1826 — 33) a series of papers entitled: Insectes Dipleres 

 du norcl de la France; afterwards (1834 — 35) Histolre naturelle 

 des Insectes Dipthes (being a part of the great French work Suites 

 a Buffon), which labour also contains a certain number of exotic 

 species. Since that time Macquart seems to have made a nearly exhau- 

 stive study of the exotic forms, on which he published a copious work : 

 Dipteres exotiques nouveaux on pen conntis, 2 vols. (1838 — 4''2) with 

 83 plates, and five supplements on it (1846 — 55) with 68 plates. 

 In it numerous species of different parts of the world and many 

 new genera are revealed ; the descriptions, however, for the greater 

 part are superficial and the figures are inexact and often lead to 

 the suspicion that they are drawn perhaps more alter defective 

 descriptions than after the natural specimens. Notwithstanding these 

 imperfections Macquart's work is in many cases an authority. 



It is useless to mention here J. W. Zetterstedt's Diptera 

 Scandinaviae , 14 volumes (1842 — 60), though highly interesting 

 for the knowledge of European species, as this author has published 

 nothing regarding exotic forms. 



J. B. RoBiNEAU Desvoidy published several works on Diptero- 

 logy, and especially the large family of Muscidae has been a subject 

 of his studies. In his J^ssai sicr les Myodaires (1830) he de- 

 scribed numerous species, among which some exotic ones, and 

 established a great many new genera. He almost always neglected 

 what earlier authors had done ; besides his descriptions are short 

 and superficial, nor are they elucidated by figures. Hence his 



