BIOLOGICAL STUDIES ON THKEE APHIDID^, 14S 



1902. Washbuen, F. L. — Insects notably injurious in 1902. < Seventh Ann. 

 Kep. State Eut. Minn., St. Anthony Parlv, p. 04, fig. i.55. Also as Bui. 

 77, Minn. Agr. Exp. Sta., November, 1902. 



Brief notes on Aphis maidis Fitch (root and aerial forms) as occurring ia 

 Minnesota ; remedies. 



*1904. Stedman, J. M. — Common corn insects. <Mo. State Board Agr., Bui. 

 3, Xo. 11, pp. 11-17. 



Notes on the com root-aphis in Missouri. 



1905. Forbes, S. A. — Field experiments and observations on insects injurious 

 to corn. <I11. Agr. Exp. Sta., Urbana, Bui. 104, pp. 102-123. 



Discuss experiments made in 1904-1905 to control the com root-aphis; 

 by means of treatment of the soil before planting. Also gives additional 

 notes on the life history. 



1905. Forbes, S. A. — Injurious insects of corn. A conference on the corn insects 

 of Illinois, at the Tenth Ann. Meeting of the 111. Farmers' Iristitute, at 

 .loliet. 111. < Springfield, 111. Plate. Also in Rep. 111. Farmers' Instil 

 tute, Springfield, Vol. X, pp. 35-45. 



Gives account of the com root-aphis and experiments made in the past 

 year. Questions and answers. One colored plate of the corn root-aphis and 

 the root-aphis ant. 



1905. Forbes, S. A. — The principal insects injurious to the corn plant. <Re- 

 port 111. Farmers' Institute, Springfield, Vol. X, pp. 240-251, figs. 17-22. 



Injury to corn and to other plants ; life history ; relation to ants ; economic 

 procedure. 



1905. KoHLER, A. R. — Insects injurious to corn. <Iowa Agriculturist, Ames, 

 Iowa, Vol. VI, No. 3, pp. 84-S5. 



Short account of the corn root-aphis. 



1905. Pettit, R. H. — Insects of the garden. <Mich. Agr. Exp. Sta., Agricul- 

 tural College, Bui. 233, p. 53. Also in Nineteenth Ann. Rep. Mich. Agr. 

 Exp. Sta., Agricultural College, 190G, p. 204. 



Mentions Aphis maidi-radicis as a corn insect, but that thus far it has not 

 been observed in Michigan. 



1905. Symons, T. B. — Conmion injurious and beneficial insects in Maryland. 



<Md. Agr. Exp. Sta., College Park, Bui. 101, pp. 100-161. 

 The com root-aphis. Short notes and remedies. 



1906. Davis, J. J. — The corn root-louse (Aphis maidi-radicis Forbes). < Illinois 



Agriculturist, Urbana, Vol. X, March, pp. 213-218, 6 figs. Abstract : 

 Wallace's Farmer, Des Moines, Iowa, Vol. XXXI, May 11, 1906, p. 637, 

 6 figs. 



General account of habits, life history, etc., and remedies. 



1906. Forbes, S. A. — The corn root-aphis and its attendant ant. <U. S. Dept. 

 Agr., Bur. Ent., Washington, D. C, Bui. 60, pp. 29^1. 



A complete account of the corn root-aphis. Discusses economic importance, 

 life history, the attendant ant, relation of ant and aphis, injury to corn, 

 natural checks on increase, practical economic measures, and a preventive 

 routine. 



1906. KiRKALDY, G. W. — Catalogue of the hemipterous family Aphidiie, with 

 their typical species, together with a list of the species described as 

 new from 1885 to 1895. <Can. Ent., London, Out., Vol. XXXVIII, p. 13. 



Lists Aphis maidi-radicis l^orbes. 



