1 88 naturalists' assistant. 



Walker, P. List of the Diptera in the CoUeetion of 

 the British Museum. 7 parts, 12 mo. 1848-56. 



Walker, F. Insecta Brittanica; Diptera. 3 vols., 8 vo. Lon- 

 don, 1851-56. 



Walker, F. Catalogues of Diptera collected by Wallace in 

 the East Indies. 8 parts. London, 1856-64. 



Werdemann, C. R. Diptera exotica. 1 vol., 12mo. 1821. 



Werdemann, C. R. Extra European Diptera. 4 vols. 8vo. 

 1828-30. (Ger.) 



Winnerz, J. Monograph of the Mycetophilidse. (Verhand- 

 lung Z06I. Bot. Soc.) 8vo. Vienna, 1863. 



Zetterstedt, J. W. Scandinavian Diptera arranged and de- 

 scribed. 14 vols., 8vo. London, 1842-60. 



COLKOPTBRA. 



Austin, E. P. Species of Sunius and Psederus in U. S. 

 (Proc. Bost. Soc, xviii, 1876.) 



Baly, J. S. Descriptive Catalogue of Hispidae. 8vo. Lon- 

 don, 1858. 



Bland, J. H. Descriptions of Staphylinidae of U. S. 8vo. 

 Phila., 1865. 



Bohemann, C. H. Monograph of CassididfE. 4 vols., 8vo. 

 Stockholm, 1850-62. (Lat.) 



Bohemann, C. II. Catalogue of Cassidse in British Museum. 

 8vo. London, 1856. 



Boisduval. Coleoptera of the "Voyage of the Astrolabe. 8vo. 

 Paris, 1885. (Fr.) 



Bonvouloir, H. Monograph of Throscidse. 8vo. Paris, 

 1859-60. (Fr.) 



Bonvouloir, H. Monograph of Eucnemidae. 8vo, 42 pis. 

 Paris, 1871-5. (Fr.) 



Br^me, F. Monograph of Cossyphidse. 8vo and 4to. Paris, 

 1842-6. (Fr.) 



