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., Vol. 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 pernidosus, 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. 137-149, 8 figs. 



Notes on Aphis persicse-niger, Agrotis ypsilon, Peridromia saucia, and legislation. 



631. JOHNSON, W. G. Answers to queries and notes on insects inju- 



rious in mills. XXI. <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. 



634. JOHNSON, W. G. New enemy to celery in Maryland. <Rural 



New Yorker, 8 October, 1898, p. 686. 

 Note on celery webwornu 



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. 39-43. 

 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. 92-94. 

 Treats briefly of a number of species. 



