BIBLIOGRAPHY OF ECONOMIC ENTOMOLOGY. 
51 
625. Johnson, W. G. Notes from Maryland on the principal injuri¬ 
ous insects of the year. <Bull. No. 9, n. s., Div. Ent., U. S. 
Dept. Agric., 1897, pp. 80-82. 
Brief notes on many common species. 
626. Johnson, W. G. The peach tree borer. <Amer. Gardening, 
1897, p. 275, 1 fig. 
627. Johnson, W. G. Notes on the Morelos orange fruit-worm. 
<Proc. Entom. Soc. Wash., Yol. IV, No. 2 (March, 1898), 
pp. 53-57. 
628. Johnson, W. G. Notes on the external characters of the San 
Jose scale, cherry scale, and Putnam’s scale. <Can. Entom., 
April, 1898, pp. 82-83. 
Remarks on Aspidiotus perniciosus, A. forbesi, and A. ancylus. 
629. Johnson, W. G. Some insects affecting the tomato. <The 
Ruralist, April, 1898. 
Notes on flea-beetle and tomato worm Sphinx. 
630. Johnson, W. G. The black peach aphis—cutworms in young 
tobacco—law providing for the suppression and control of 
insect pests and plant diseases in Maryland. <Bull. No. 55, 
Md. Agric. Exp. Sta., May, 1898, pp. 137-119, 8 figs. 
Notes on Aphispersicas-niger, Agrotis ypsilon, Peridromia saucia, and legislation. 
631. Johnson, AY. G. Answers to queries and notes on insects inju¬ 
rious in mills. XXL <Amer. Miller, 1 June, 1898. 
Notes on Tenebroides mauritanicus. 
632. Johnson, W. G. 'Report on the San Jose scale in Maryland, and 
remedies for its suppression and control. <Bull. No. 57, 
Md. Agric. Exp. Sta., August, 1898, pp. 116, 26 figs. 
A detailed account of many experiments, particularly with hydrocyanic-acid 
gas. 
633. Johnson, W. G. Answers to queries and notes on insects inju¬ 
rious in mills. XXII. <Amer. Miller, October, 1898, p. 
777, 2 figs. 
Damage by Sitotroga cerealella. 
631. Johnson, W. G. New enemy to celery in Maryland. <Rural 
New Yorker, 8 October, 1898, p. 686. 
Note on celery webworm. 
635. Johnson, W. G. Hydrocyanic acid gas as a remedy for the San 
Jose scale and other insects. <Bull. No. 17, n. s., Div. Ent., 
U. S. Dept. Agric., November, 1898, pp. 39—13. 
Result of his experiments. 
636. Johnson, W. G. Notes from Maryland on the principal injurious 
insects of the year. <Bull. No. 17, n. s., Div. Ent., U. S. 
Dept. Agric., November, 1898, pp. 92-91. 
Treats briefly of a number of species. 
