48 BIBLIOGRAPHY OF ECONOMIC ENTOMOLOGY. 



584. HOWARD, L. O. The principal insects affecting the tobacco 



plant. <Yearbook U. S. Dept. Agric. f. 1898 (May, 1899), 

 pp. 120-150, 25 figs. 

 Detailed account of the various species known to injure tobacco. 



585. HOWARD, L. O. The extermination of the mosquito. <Sci. 



Amer. Supp., 3 June, 1899, p. 19593. 

 Regarding the so-called permanganate of potash remedy. 



586. HOWARD, L. O. Pests of the hop crop. <Hop Industry, 



Orange Judd Co., New York, 1899, pp. 113-141, 19 figs. 

 Accounts of the species known to affect hops. 



587. HOWARD, L. O. Wheat-head army worm. <Southern Planter, 



August, 1899. 



588. HOWARD, L. O. A remedy for gadflies: Porchinski's recent 



discovery in Russia, with some American observations. 

 <Bull. No. 20, n. s., Div. Ent., U. S. Dept. Agric., Novem- 

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589. HOWARD, L. O. The present status of the caprifig experiments 



in California. <Bull. No. 20, n. s., Div. Ent, U. S. Dept. 

 Agric., November, 1899, pp. 28-35. 

 A resume of the subject. 



590. HOWARD, L. O. Report of the entomologist for 1899. <Rept. 



Seer. Agric. 1899, pp. 43-52, December, 1899. 



591. HOWARD, L. O., and MARLATT, C. L. The original home of the 



San Jose scale. <Bull. No. 20, n. s.,Div. Ent., U. S. Dept. 

 Agric., November, 1899, pp. 36-39. 

 A consideration of the evidence as to origin of the scale. 



592. HOYT, M. A. Killing peach tree borers. <Colman's Rural 



World, 8 July, 189T, p. 211. 

 Using hot water. 



593. HUBBARD, H. G. The ambrosia beetles of the United States. 



<Bull. No. 7, n. s., Div. Ent., U. S. Dept. Agric,, 1897, pp. 

 9-30, 34 figs. <Yearbook U. S. Dept. Agric. f. 1896 (1897), 

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 The life history of certain Scolytidae. 



594. HUBBARD, H. G., and PERGANDE, THEO. A new coccid on birch. 



<Bull. No. 18, n. s., Div. Ent., U. S. Dept. Agric., 1898, 

 pp. 13-26, 8 figs. 

 Description and life history of Xylococcus betulie. 



595. HUNTER, S. J. The more destructive grasshoppers of Kansas. 



<Bull. Dept. Entom. Univ. Kans., October, 1897, pp. 11, 

 pis. 4. 

 Treats of a number of species, with remedies. 



596. HUNTER, S. J. Guard against San Jose scale. <Kansas Farmer, 



9 December, 1897. 



