SCALE INSECTS OF IMPORTANCE 319 



Hallock, Nicholas. San Jose scale on Long Island. Rural New 

 Yorker. 1898. 57 : 688 (infested fruit shown at fair). 



Howard, L. O. San Jose scale in 1896-97. U. S. dep't agric. div. 

 ent. Bui. 12, n. s. 1898. p. 1-33 (history of the insect 1896-97, bib_ 

 liography brought down to date) ; Recent laws against injurious insects 



in North America. Bui. 13, n. s. 1898. p. 1-68 (compilation 



of laws, many of which relate to the San Jose scale); San Jose scale on 



dried fruit. Bui. 18, n. s. 1898. p. 7-13 (experiments proving 



that living scales can not exist on dried fruit) ; Regulations of foreign 

 governments regarding importation of American plants, trees and fruits- 

 Circular4i. 2d ser. 1900. p. 1-4 (brief synopsis of rules). 



Hopkins, A. D. Some notes on observations in West Virginia. 

 U. S. dep't agric. div. ent. Bui. 18, n. s. 1898. p. 44-45 (effects of 

 kerosene). 



Johnson, W. G. Hydrocyanic acid gas as a remedy for the San 

 Jose scale. U. S. dep't of agric. div. ent. Bui. 17, n. s. 1898. p. 39- 

 43 (results of experiments) ; Report on the San Jose scale in Mary- 

 land, and remedies for its suppression and control. Md. agric. expt. 

 sta. Bui. 57. 1898. p. 1-116 (an exhaustive account) ; Notes on 

 the external characteristics of the San Jose scale, cherry scale and 

 Putnam's scale. Can. ent. 1898. 30: 82-83 (grosser characteristics) ; 

 Nursery fumigation and the construction and management of the fumi- 

 gating house. Pa. dep'tagric. Bui. 56. 1899. p. 1-24 (directions for 

 fumigation); Miscellaneous entomological notes. U. S. dep't agric div. 

 ent. Bui. 20, n. s. 1899. p. 66 (new infested localities found, effects 

 of cold weather) ; Some physiological effects of hydrocyanic acid gas 

 upon plants. Sci. Amel^ican, suppl. no. 1249. Dec. 1899. p. 20,026-27 

 (details of effects on various trees and shrubs) ; Aphelinus fusci- 

 p e n n i s an important parasite of the San Jose scale in the eastern 

 United States. U. S. dep't agric. div. ent. Bui. 26, n. s. 1900. 

 p. 73-74 (observations on parasites) ; Use of hydrocyanic acid gas. 

 Rural New Yorker. 1900. 59 : 1-2, ;^^, 65, 82-83 (application and 



methods) ; Fumigating nursery trees. 59 : 495 (sunmiary 



account) ; Points about winter spraying. American agriculturist. 

 1900. 66:677-78 (directions for winter work) ; Fumigation of nursery 



stock. 1901. 67: 236-38 (directions for fumigating) ; Kffects 



of gas on nursery stock. 67 : 362 (gives amounts dif- 

 ferent kinds of nursery stock will stand) ; Important enemy of the 

 San Jos6 scale. 67: 398 (notice of Aphelinus fusci- 



