26 
CORN. 
The Hessian Fly ; its ravages, &c. U.S.A. Department of Agriculture: Third 
Keport of Entomological Commission. Washington, 1883. (Eeprinted, with 
additions and corrections, from Bulletin IV. of the U. S. Entomological Com¬ 
mission. 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. Cohn. 
Die schadlichen insekten Eusslands. 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. Stutt¬ 
gart, 1874. Pp. 734 - 741. 
Corn Sawfly. CepJms pygm(BUs, Curtis. 
Cephus pygmies, Curtis. 
1, 2, Sawfly, magnified, with nat. size; 3, stem containing maggot; 4, 5, maggot, 
mag. and nat. size; 6, 7, parasite fly, Fachymerus ccecitrator, mag., with nat. size. 
The injury caused by Corn Sawfly may be easily mistaken at a 
passing glance for that caused by Hessian Fly, as in both cases the 
