[Out of print.]No. 17.--The Chinch Bug: A general Summary of its History, Habits, Enemies, and of the Remedies and Preventives to be used against it. By L. O. Howard M. S., Assistant Entomologist. (1888.) [pp. 48, figs. 10.] [Out of print.]No. 18.--The Life and Entomological Work of the late Townend Glover, first Entomologist of the United States Department of Agriculture. Prepared under the Direction of the Entomologist, by C. R. Dodge. (1888.) [pp. 68, figs. 6, plates I.] No. 19.--An enumeration of the published Synopses, Catalogues, and Lists of North American Insects; together with other information intended to assist the student of American Entomology. (1888.) [pp. 77.] [Out of print.]No. 20.--The Root Knot Disease of the Peach, Orange, and other Plants in Florida, due to the Work of Anguillula. Prepared under the Direction of the Entomologist, by J. C. Neal, Ph. D., M. D. (1889.) [pp. 31, plates 21.] [Out of print.]No. 21.--Report of a Trip to Australia, made under the Direction of the Entomologist to investigate the Natural Enemies of the Fluted Scale, by Albert Koebele. (1890.) [pp. 32, figs. 16.] No. 22.--Reports of the Observations and Experiments in the practical Work of the Division, made under the Direction of the Entomologist. (1890.) [pp. 110.] No. 23.--Reports of Observations and Experiments in the practical Work of the Division, made under the Direction of the Entomologist. (1891.) [pp. 83.] No. 24.--The Boll Worm. Preliminary Report, made under the Direction of the Entomologist. By F. W. Mally. (1891.) [pp. 50.] No. 25.--Destructive Locusts. A popular consideration of a few of the more injurious Locusts or "Grasshoppers" of the United States, together with the best means of destroying them. By C. V. Riley, Ph. D. (1891.) [pp. 62, figs. 11, plates 12.] [12]No. 26.--Reports of Observations and Experiments in the practical Work of the Division, made under the Direction of the Entomologist. (1892.) [12]No. 27.--Reports on the Damage by destructive Locusts during the season of 1891, made under the Direction of the Entomologist. (1892.) [pp. 64.] [12]No. 28.--The more destructive Locusts of America, north of Mexico, by Lawrence Bruner, prepared under Direction of the Entomologist. (1892.) [12] Bulletins 26 and 27 are in press, and Bulletin 28 is in course of preparation. SPECIAL REPORTS AND BULLETINS. [Out of print.]REPORT ON COTTON INSECTS.--By J. Henry Comstock. (1879.) [pp. 511, figs. 77, plates III.] [13]SPECIAL REPORT, No. 11.--The Silkworm; being a brief Manual of Instructions for the Production of Silk. Prepared, by direction of the Commissioner of Agriculture, by C. V. Riley, M. A., Ph. D., Entomologist. (First ed., 1879; fifth ed., 1885.) [pp. 37, figs. 8.] [13] Bull. No. 9 of the Division of Entomology covers this subject.