144 MISCELLANEOUS PAPERS. 



1906. Sanborn, C. E. — Kansas ApliiditUe, ^vitb catalogue of North Americ-au 



Apliiclidie, and with host-plant and plant-host list. Part 2. < Kansas 

 Univ. Sci. Bui., Lawrence, A'ol. Ill, No. 8, p. 258. 



Lists food plants of Aphis maidi-radicis Forbes as Amarantus hybridus, 

 Erigeron canadensis, Oxalis stricia. Plant ago major, Portulaca oleracea, 

 Rumex crispus, Seiaria italica germanica ocliloa, and corn. 



1907. Chittenden, F. H. — Insects injurious to vegetables. <New York, pp. 



189-190, fig. 121. 



Short account of the corn root-aphis, including economic treatment. 



1907. Forbes, S. A. — The corn root-louse. < Fayette County Democrat, Effing- 

 ham, 111., Vol. XLVII, No. 19, March 6, 1907; Bureau County (111.) 

 Record, March 6; The Weekly Pantagraph, Bloomington, III., Vol. XC, 

 No. 12, March 22. Also in many other Illinois newspapers. 



Gives detailed accounts of the new cil-of-lemon treatment, which he has 

 found to be the most effective method of controlling the coi-n root-aphis. 



1907. Stout, J. P. — Control of the corn root-aphis. < Illinois Agriculturist, 

 Urbaua, April, pp. 245-247, 4 figs. 



Gives methods which have been successfully used to combat the corn root- 

 aphis, including the oil-of-lemon treatment, which Doctor Forbes has proved 

 to be the most practical method of controlling this root-aphis. 



1907. Webster, F. M. — ^The corn leaf-aphis and corn root-aphis. <U. S. Dept. 

 Agr., Bur. Ent., Washington, D. C, Cir 86, May 6, 1907, figs. 3, 4. 



Gives general description and discusses : Root-aphis and the little brown 

 ant ; life history and habits ; natural enemies ; preventive and remedial 

 measures. 



1907. Forbes, S. A. — Insects in relation to health. <Rept. 111. Farmers' Inst., 



Springfield, vol. 12, pp. 263-265. 



In a few introductory remarks, preceding a lecture on " Insects in relation 

 to health," Doctor Forbes reports on the success of the oil-of-lemon treatment 

 for corn seed to protect it from the attacks of the corn root-aphis. Methods 

 of treating the seed are given. 



1908. Forbes, S. A. — Experiments with repellents against the corn root-aphis. 



<Journ. Econ. Ent., Concord, N. H., vol. 1, No. 2, pp. 81-83. 



Abstract of a paper read by Doctor Forbes at the 20th annual meeting of 

 the Association of Economic Entomologists. Gives in detail results of field 

 experiments, in 1906, against the corn root-aphis by treatment of the seed 

 with oil of lemon, carbolic acid, formalin, and kerosene. 



1908. Forbes, S. A. — Experiments with repellents against the corn root-aphis. 

 <Orange Judd Farmer, Chicago, 111, vol. 44, No. 16, April 15, pp. 

 501, 504. 



Gives results of field experiments, in 1906, against the corn root-aphis by a 

 treatment of the seed with oil of lemon, carbolic acid, formalin, and kerosene. 

 Several farmers who used the oil-of-lemon treatment in 1907 reported injury 

 by the treatment. Mentions that further experiments will be made in Illinois 

 in 1908. 



THE CORN LEAF-APHIS. 



{Aphis maklis Fitch.) 

 GENERAL ACCOUNT. 



The corn leaf -aphis was first found injuring corn by Dr. Asa Fitch, 

 and in liis Second Report of the Insects of New Yorlv (1856) he de- 

 scribes it, and proposes for it the name of Aphis maidis, giving an 



