58 BULLETIN 816, U. S. DEPARTMENT OF AGRICULTURE. 
The Importation into the United States of the Parasites of the Gipsy Moth and the 
Brown-Tail Moth. (Entomology Bulletin 91.) Price, 65 cents. 
The Dispersion of the Gipsy Moth. (Entomology Bulletin 119.) Price, 20 cents. 
The Green-Striped Maple Worm. (Entomology Circular 110.) Price, 5 cents. 
The Oak Pruner. (Entomology Circular 130.) Price, 5 cents. 
The Dying Hickory Trees: Causeand Remedy. (Entomology Circular 144.) Price, 
5 cents. 
Flour Paste as a Control for Red Spiders and as a Spreader for Contact Insecticides. 
(Entomology Circular 166.) Price, 5 cents. 
Three Undescribed Heart-Rots of Hardwood Trees, Especially of Oak. (Journal of 
Agricultural Research, vol. 1, No. 2.) Price, 25 cents. 
A Serious Disease in Forest Nurseries Caused by Peridermium filamentosum. (Jour- 
nal of Agricultural Research, vol. v, No. 17.) Price, 10 cents. 
The Chestnut Bark Disease. (Separate 598, from Yearbook of the Department of 
Agriculture for 1918.) Price, 10 cents. 
Practical Tree Surgery. (Separate 622, from Yearbook of the Department of Agri- 
culture for 1913.) Price, 10 cents. 
Forest Tree Diseases Common in California and Nevada. (Forest Service Unnum- 
bered Publication.) Price, 25 cents. 
ADDITIONAL COPIES 
OF THIS PUBLICATION MAY BE PROCURED FROM 
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GOVERNMENT PRINTING OFFICE 
WASHINGTON, D.C. 
AT 
15 CENTS PER COPY 
V 
