BIBLIOGRAPHY CF ECONOMIC ENTOMOLOGY. 
45 
714. Hopkins, A. D. The joint worm in wheat. <Bull. No. 69, 
W. Va. Agric. Exp. Sta., October, 1900, pp. 345-347, 1 pi. 
715. Hopkins, A. D. Insect enemies of the spruce in the Northeast. 
<Bull. No. 28, n. s., Div. Entom., U. 8. Dept. Agric., 
October, 1901, pp. 1-48, 2 figs., 15 pis. 
716. Hopkins, A. D. Circular of warning. <W. Va. Agric. Exp. 
Sta., 15 October, 1901, 1 p., 1 map. 
Relating to the 1902 swarm of the periodical Cicada. 
717. Hopkins, A. D. Insect enemies of forests and forest products. 
<The Forester, 1901, p. 250-254, 5 figs. 
718. Hopkins, A. D. Insects detrimental and destructive to forest 
products used for constructing material. <Bull. No. 31, n. 
s., Div. Entom., U. 8. Dept. Agric., January, 1902, pp. 60-62. 
719. Hopkins, A. D. Insect enemies of the pine in the Black Hills 
forest reserve. <Bull.. No. 32, n. s., Div. Entom., U. S. 
Dept. Agric., April, 1902, pp. 24, pis. vii, figs. 5. 
720. Hopkins, A. D. What to do with locusts. <Rural New Yorker, 
17 May, 1902, p. 351. 
721. Hopkins, A. D. Some insect enemies of living trees. <Proc. 22d 
Ann. Meet. Soc. Prom. Agric. Science, pp. 66-69 (1902). 
722. Hopkins, A. D. On the study of forest entomology in America. 
<Bull. No. 37, n. s., Div. Entom., U. S. Dept. Agric., 
November, 1902, pp. 5-28. 
723. Hopkins, A. D. The powder post beetle. <Amer. Agricul¬ 
turist, 15 November, 1902. <New England Homestead, 1 
November, 1902. 
724. Hopkins, A. D. Insect enemies of the redwood. <Bull. No. 38, 
Bur. Forestry, U. 8. Dept. Agric., March, 1903, pp. 32-40, 4 
figs. 
725. Hopkins, A. D. Some of the principal insect enemies of conif¬ 
erous forests in the United States. <Yearbook, Dept. 
Agric. f. 1902 (July, 1903), pp. 265-282, 10 figs., 2 pis. 
726. Hopkins, A. D. Powder post injury to seasoned wood products. 
<Cir. No. 55, Div. Ent., U. S. Dept. Agric., December, 1903, 
5 pp., 1 fig. 
726a. Hopkins, A. D. Methods of work and some results in forest 
insect investigations. <Proc. 17th Ann. Conv. Amer. 
Agric. Coll, and Exp. Stations; Bull. No. 142, Off. Exp. 
Sta., Dept. Agric., 1904, pp. 180-182. 
727. Hopkins, xV D. Catalogue of insect enemies of forests and forest 
products, at the Louisiana Purchase Exposition, St. Louis, 
Mo., 1904. <Bull. No. 48, Div. Entom., U. S.'Dept. Agric., 
pp. 56, 22 pis. 
St. Louis Exhibit. 
