. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. THE INIMICAL LEAFHOPPER. 73 century ago, but the next mention of it from an economic standpoint appears to have been in 1884, when Prof. Forbes speaks of it as occurring in corn and also injuring wheat in connection with two other species of leafhoppers which he described in detail. Dr. Fitch merely mentions it in his list published in 1851, but does not seem to have recognized its economic importance. Other notice of it does not appear until 1890, when, in a report to the Division of Ento- mology, I called atten
. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. THE INIMICAL LEAFHOPPER. 73 century ago, but the next mention of it from an economic standpoint appears to have been in 1884, when Prof. Forbes speaks of it as occurring in corn and also injuring wheat in connection with two other species of leafhoppers which he described in detail. Dr. Fitch merely mentions it in his list published in 1851, but does not seem to have recognized its economic importance. Other notice of it does not appear until 1890, when, in a report to the Division of Ento- mology, I called attention to its abundance and its destructiveness in Iowa in connection with other insects. I also described the general appearance of the larva in 1891 and published some de- tails of the life history in 1892 and 1893. Also, in Bulletin 19 of the Iowa Agricultural Experi- ment Station, I described the treatment for it, especially with the hopperdozer. Prof. F. M. Webster, in 1896, mentioned the life history, etc., in Bulletin 68 of the Ohio Agricultural Experi- ment Station. DISTRIBUTION. The species is one of very wide distribution in America (see fig. 13) and appears to be confined to this country. Van Duzee, in his catalogue, credited it to Canada and the United States west to the Rocky Moun- tains, but later records indicate its general occurrence all the way from Maine to Washington State and south at least to Tennessee and southwest to Kansas. In tlie summer of 1909 I found it on grass at Ames, Iowa; in tlie Missouri Valley in grass, timothy, wheat, and alfalfa; in South Dakota at Vermillion^ and at Brookings in wheat, bluegrass, timothy, and wild grass; in North Dakota at Fargo, June 25 to 28, full-grown nymphs and adults, in pasture, especially an old brome-grass pasture and a timothy-clover pasture. At Ada, Minn., July 2, in wheat fields and grass; at Dickinson, N. Dak., July 8, in alfalfa; at Mammoth Hot Springs, Yellowstone Park, July 14, in irrigated plat (?); at Bozem
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