BOOKS. 125 



Diptera. c Systematic Description of the European Two- 

 winged Insects,' by J. W. Meigen. In six volumes, with 

 numerous plates. A short Latin description of each insect 

 is given ; the remainder of the work is in German. Nearly 

 all the British species are described. 



Hymenoptera. 1 . Natural History of Ants, and a collec- 

 tion of Memoirs and Observations on Bees, by P. A. La- 

 treille, in one volume. This work is written in French. It 

 contains descriptions of all the Ants (or nearly so) inhabi- 

 ting this country. 2. 'An Essay on the Indigenous Fosso- 

 rial Hymenoptera; comprising a description of all the 

 British Species of Sand-wasps,' by W. E. Shuckard. 3. 

 'Systema Piezatorum,' by J. C. Fabricius. One volume, 

 written in Latin. Since this work was published, much 

 knowledge has been gained concerning the insects which 

 it describes. 4. Monograph of the Bees of England 

 ('Monographia Apum Anglic'), by William Kirby, in two 

 volumes, with plates. This work is written in Latin, and 

 is one of the most perfect entomological works any country 

 has yet produced. Modern discoveries have, however, 

 added some facts concerning identity of species. 5. 'Es- 

 say on Parasitic Hymenoptera,' by A. H. Haliday, pub- 

 lished in the Entomological Magazine. 6. Monograph of 

 Chalcidites ( f Monographia ChalciditunT), by Francis Wal- 

 ker, published in the Entomological Magazine, vol. i. pp. 

 12, 115, 367, 455 ; vol. ii. pp. 148, 286, 340, and concluded 

 as a separate work : this most laborious monograph con- 

 tains descriptions of every British species. 7. Article 

 ' Insecta,' by William Elford Leach, published in the Edin- 

 burgh Encyclopaedia, vol. ix. p. 142. Three British genera 

 and species described. 8. European Ichneumonology, 

 ('Ichneumonologia Europaea'), by J. L. C. Gravenhorst, 

 three volumes, written in Latin. An excellent and most la- 

 borious work. 9. Monograph of the Tenthredoes ( 'Mono- 



