Pear-tree psylla (Psylla pyricola Forest)
By: [by C.L. Marlatt]
Series: Circular / United States. Dept. of Agriculture. Division of Entomology -- no. 7, sec. series.; Circular (United States. Division of Entomology) -- 2nd series, no. 7.
Publisher: United States Department of Agriculture, Division of Entomology
Published: 1895
Place of publication: Washington, D.C
Language: eng
Subjects: Jumping plant-lice; Pear; Diseases and pests
Notes: Caption title

"Washington, D.C., May 1, 1895"--P. 8.