140 MISCELLANEOUS PAPERS. 



3 889. Forbes, S. A, — Fifteenth Report of the State Entomologist of Illinois for 

 1885-1886. <Traus. Dept. Agr. 111. for 1885, Springfield, Vol. XXIII, 

 pp. 5-6. Separate: Springfield, 111., 1889. 



Brief notes on the injuriousness of Aphis maidis, and observations made on 

 the winter historj' of the root form. 



1889. Marten, J. — Tlie corn-root aphis. <Prairie Farmer, Chicago, 111., Octo- 

 ber 12, 1889, p. 660, 4 figs. 



Short senei'al account of ApJiis maidis (root and aerial forms). 



1889. Weed, C. M. — The corn root louse. <Amer. Nat., Philadelphia, Pa., Vol. 



XXIII, pp. 110.5-llOG. 



Reference to articles on Aphis maidis (?), root form, in the Fifteenth 

 and Sixteenth Reports of the State Entomologist of Illinois. 



1890. Forbes, S. A.— Sixteenth Report of the State Entomologist of Illinois for 



1887 and 1888. <Trans. Dept. Agr. 111., Springfield, Vol. XXVI, p. 

 XII. Separate: Springfield, 111., 1890. 



Notes on injuries done by corn root-aphis. 



1890. Weed. C. M. — Corn insects : An important matter. <Ohio Farmer, Cleve- 

 land, Ohio, January 25, 1890, p. 57. 



Notes on damage by the corn root-aphis. 



1890. AVeed, C. M.— Insects affecting corn. <Ohio Agr. Exp, Sta., Columbus, 



, second series, Vol. Ill, No. 4, pp. 135-136, fig. 20. 



Brief notes on the life history of the corn root-aphis. 



1891. — P'oRBES, S. A. — Seventeenth Report of the State Entomologist of Illinois 

 for 1889 and 1890. <Trans. Dept. Agr. 111., Springfield, Vol. XXVIII, 

 pp. 64-70, colored plate " B," figs. 1, 2, 3, 4. Separate : Springfield, 

 111., 1891. 



Aphis maidi-radicis, n. sp. Proposes name for the root form of the corn 

 aphis, and gives a full account of the life history, covering, as points of special 

 interest, time and place of oviposltion, stage and place of hibernation, relations 

 of root-aphis to leaf-aphis of corn, other food plants, and the relations of the 

 root-aphis to ants. Economic measures are suggested. 



J 891. Forbes, S. A. — A summary history of the corn root-aphis. < Insect Life, 

 U. S. Dept. Agr., Washington, D. C, Vol. Ill, pp. 23.3-238. 



Covers the same points in the life history of the corn root-aphis as in the 

 citation above. 



* 1891. Osborn, H. — The corn root-aphis. < Orange Judd Farmer, Chicago, 111., 

 April 25, 1891, p. 260. 



Gives suggestions made by Doctor Forbes as to the methods to be used in 

 diminishing the injury by this aphis. 



1891. Pearson, J. — Destructiveness of the corn-root plant-louse in Nebraska. 



< Insect Life, V. S. Dept. Agr., Washington, I). C. A'ol. lY, p. 142. 



In Nebraska some farmers lost as much as one-third of their crop. He sug- 

 gests rotation of corn with small grain. 



1891. Weed, C. M. — Sixth contribution to a knowledge of the life history of 

 certain little-known Aphidids. <Bul. 111. State Lab. Nat. Hist., 

 Urbana, Vol. Ill, art. 12. (Written December, 1887.) 



Aphis maidis (?), root form. Summary of known life history. Hatching 

 of aphides from eggs in spring. True sexes produced in fall and eggs are 

 laid which are cared for l)y ants through the winter. Descriptions of the 

 wingless male and the egg. 



