104 



French, (j. H. — The Corn Root Worm, Prairie Farmer, Sept. 

 18. Reports letters of S. A. Forbes and E. R, Boardman; 

 repeats suggestion of clean culture and rotation of crops ; 

 and expresses belief that larvae will be found feeding upon 

 the roots of Compositse. 



Forbes, S, A, — Idem. Prairie Farmer, Sept. 18. Reports to 

 Prof. French absence of imagos in food of birds, and de- 

 termines, by dissection, that adults feed upon pollen of 



thistles. 



Boardman, E. R. — ^Idem. Prairie Farmer, Sept, 18. Gives 

 additional data on life history and injuries to Indian corn ; 

 notes damage done by imagos by eating silk and preventing 

 fertilization. Reports that he has found larvae in roots of 

 rag weed, and thinks proof conclusive that the insect is 

 more than one-brooded. 



Riley, C. V. — Diahrotica longicornis Amer. Ent. III., October, 

 p. 247, Date of first receipt of larvae and pupae, August, 1874. 

 Invariably found in conjunction with real wireworm, Drasterius 

 amabilis, which he believes feeds upon corn root worm. Sug- 

 gests rotation of crops, destruction of ragweed, and the ap- 

 plication of lime and ashes. 



Webster, F. M. — More about the New Corn Insect. Prairie 

 Farmer, October 2, 1880. Notes no damage at time of writ- 

 ing, although in cornfields in numbers double that of year 

 preceding. Leptotrachelus dorsalis more abundant than for- 

 merly. 



1881. Thomas, Cyrus. — Diahrotica longicornis. 10th Rep. St. Ent. 



111., pp. 44-46. Contains a letter from Dr. E. R. Boardman, 

 of Stark county, 111. (See under 1880, French, G. H.) De- 

 scribes larva and imago ; gives distribution ; and ex- 

 presses the opinion that the insect is not likely to prove 

 troublesome. 



1882. French, G. H.— Idem. 11th Rep. St. Ent. 111., pp. 65-73. 



Character and amount of injury done as reported by several 

 correspondents. Said to live in roots of ragweed as well as 

 in Indian corn, and thought to be two- or more brooded. 

 Food of imagos. Rotation of crops and clean culture rec- 

 ommended. Description of larva and imago. 



Saunders, W. — Idem. Rep. Ent. Soc. Ont., 1881, p. 7. Brief 

 synopsis of the account of this insect in 10th Rep. St. Ent. 

 111. 



Forbes, S. A. — The Corn Root Worm in McLean County. 

 Bloomington "Leader," September, 1882. Means of identify- 

 the injuries of this insect. Finds it in nearly all the fields 

 of Indian corn visited, retarding growth of plant. Rotation 

 of crops a complete remedy. 



Forbes, S. A. — The Corn Root Worm, Diahrotica longicornis, 

 Say. Illinois Department of Agriculture, Circular No. 94, 

 Illinois Crops for 1882, p. 122. Reports the recent discovery 

 of the eggs of the imago, and gives first correct statement 



