The clover root-borer (Hylastinus obscurus Marsham) Webster, F. M. (Francis Marion), 1849-1916 creator United States. Bureau of Entomology. contributor United States. Department of Agriculture. contributor text book Washington, D.C U.S. Dept. of Agriculture, Bureau of Entomology 1905 1905
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ENG Circular No. 67. "December 28, 1905." At head of title: United States Department of Agriculture, Bureau of Entomology. Description of the insect -- Life insect. pp. 2. Food plants -- Method of attacking red clover. pp. 3. Effect upon the plant -- Natural enemies -- Preventive measures. pp. 4. Borers (Insects) Diseases and pests Hylastinus obscurus Roots (Botany) Circular (United States. Bureau of Entomology), no. 67 https://www.biodiversitylibrary.org/bibliography/63509 810924490 10.5962/bhl.title.63509 LHL