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 BIBLIOGRAPHICAL EEFEEENCES. 



The following list gives the titles of some of the publi- 

 cations in which information will be found regarding 

 the original identification of the species of Cecidomyia 

 destructor by Thomas Say, and likewise regarding its 

 habits, history, and distribution in America and Europe, 

 and means of prevention and remedy. The most im- 

 portant and serviceable of the papers are those of the 

 U.S.A. Department of Agriculture, and the papers by 

 Dr. B. Wagner : 



Some account of the insect known as the Hessian Fly. By 

 Thomas Say. Journal of Academy of Nat. Sciences, i., pp. 45 - 48, 

 1817. 



The Hessian Fly ; its ravages, &c. U. S. A. Department of Agri- 

 culture : Third Eeport of Entomological Commission. Washington, 

 1883. (Eeprinted, with additions and corrections, from Bulletin IV. 

 of the U.S. Entomological Commission. By A. S. Packard, jun., 

 1880). 



The Hessian Fly : its history, &c. By Asa Fitch, M.D. Trans, 

 of the New York State Ag. Soc., vi., 1846. Albany, 1847. 



The Hessian Fly not imported from Europe. By Dr. H. A 

 Hagen. Canadian Entomologist, 197 - 207, 1880. 



Introduction to Entomology. By W. Kirby and W. Spence. 

 1815-26, i. 



Untersuchungen iiber die neue getreide gall-mucke. Von Dr. 

 Balthasur Wagner. Fulda & Hersfeld. 1861. 



Die neue kornmade. Von Dr. H. Loew. 1859. 



Naturgeschichte der schadlichen insecten. Von V. Kollar. Wien, 

 1837. English translation by J. & M. Loudon, with notes by J. 0. 

 Westwood. London, 1840. 



Untersuchungen iiber Insectenschaden auf den schlesischen 

 getreidefeldern im Sommer 1869. Von Prof. Dr. Ferd. Colin. 



Die schadlichen insekten Kusslands. Von. F. T. Koppen. St. 

 Petersburg, 1880. 



Synopsis Cecidomyidarum. Von J. E. Bergenstamm und Paul 

 Loew. Wien, 1876. 



Die Praktische Insekten kunde. Von Dr. E. L. Taschenberg. 

 Bremen, 1880. Pt. iv., pp. 9 - 14. 



Die Pflanzenfeinde aus der classe der Insekten. Von J. H. 

 Kaltenbach. Stuttgart, 1874. Pp. 734-741. 



PBINTED BY WEST, NEWMAN AND CO. HATTON GARDEN LONDON, E.G. 



