1C3 



saying that it occurs in the roots of Indian corn stalks. 

 Treats as a grape insect. Describes the larva. 



1870. EiLEY, C. Y.—Prionus imhricornis. 2d Eep. St. Ent. Mo., 



pp. 89-91, fig. 63. States that the larva he described as 

 Orthosoma cylindricum is probably that of above species. 

 Gives food habits of two other closely allied species. 



1871. Glover, Townend.— Idem. Eep. Com. Agr., 1870, p. 72. 



Gives food plants according to Eiley. 



1876. Thomas, Cyrus.— Idem. 6th Eep. St. Ent. 111., p. 148. Dis- 

 tinguishing characters. Eemedies. 



Family Chrysomelid^. 



54. The Corn Eoot Worm. 



{Diahrotica longicornis, Say.) 



1823. Say, Thomas. — Galleruca longicorn'n^. Journ. Acad. Nat. Sci. 

 Phila. III., 460. Complete writings II., 223. Original descrip- 

 tion. Obtained specimens near Eocky Mountains. 



1879. Eiley, C. V. — Diahrotica longicornis. Eep. Com. Agr., 1878, 



p. 208. Correspondent from Missouri reports that his In- 

 dian CORN was seriously damaged by larvse of this insect. 



1880. French, G. H. — A Corn Insect. Prairie Farmer, Aug. 



9. Publishes a letter from Dr. E. E. Boardman, Stark 

 county. 111., [see following entry] accompanying corn root 

 worms. Describes these briefly, notes Iheir resemblance to 

 larvae of Diahrotica vittata and determines them doubtfully as 

 larvse of Chrysomelit's. 



Boardman, E. E. — Idem, Prairie Farmer, Aug, 9. In a let- 

 ter to Prof. French reports serious injury to roots of Indian 

 corn, and sends larvae evidently responsible for it. 



French, G. H. — The New Corn Insect. Prairie Farmer, 

 Sept. 4. Eeports additional letters from Dr, Boardman 

 (see following entry) ; identifies larva as that of Diahrotica 

 longicornis by breeding ; and infers from the life history of 

 D. vittaia that D. lo)tg'icor}iis will prove to be two- or three- 

 brooded, and that it deposits its eggs at the roots of In- 

 dian CORN. Discusses clean culture, rotation of crops, and 

 alkaline applications as remedies, 



Boardman, E. E. — Idem. Prairie Farmer, Sept. 4. Letters 

 to Prof. French reporting great abundance of Diahrotica lon- 

 gicornis in localities infested by the corn root worm, and 

 expressing the belief that the latter is the larva of that 

 species. Gives additional details on life history and extent 

 of injury to Indian corn, and notes abundance of imago 

 on rag weed. Approves rotation of crops and suggests de- 

 struction of rag weed as a remedy. 



