ECONOMIC WORK AGAINST HOWARD SCALE. 87 



Mr. J. B. Smith stated that this sawfly occurs in Xew Jersey, as 

 he has found it at South Orange, and Mr. Titus reported finding it 

 in Pennsylvania. 



A paper was read, entitled: 



ECONOMIC WORK AGAINST THE HOWARD SCALE IN COLORADO. 

 i A8pidiotU8 howardii ( Jkll.) 



By E. P. Taylor. Fort Collins. Colo. 



It is my opportunity to report the first economic work against a 

 new and important fruit-tree pest, Aspidiotus ho wardii Ckll., which 

 \>, doing great damage to orchard trees in parts of Colorado and other 

 points in the West. 



The insect has been previously reported in various entomological 

 publications, but up to a short time ago has received little attention 

 from an economic standpoint. Upon discovery of its injurious work 

 in the orchard sections of western Colorado I was enabled to under- 

 take economic experiments for its control, and it is upon these pre- 

 liminary test- that this paper is based. 



As an introduction I shall briefly treat of the history of the insect 

 from its first discovery at Canon City. Colo., by Prof. C. P. Gillette, 

 on August 31, 1894. These first specimens were taken by Profe— <>r 

 Gillette upon the fruit of plum, and specimens were sent to both 

 Dr. L. O. Howard and to Prof. T. D. A. Cockerell. then of the New 

 Mexico Agricultural Experiment Station, but now of the University 

 of Colorado. The former pronounced the insect an entirely new 

 species, and Professor Cockerell. after study and comparison, intro- 

 duced the insect as a new specie-. Aspidiotus howardii Ckll.. in an 

 original description publi>hed in the Canadian Entomologist. Volume 

 XXVII. page 16 (1805). Professor Cockerell himself encountered 

 the scale at Albuquerque. X. Mex., in August, 1895, upon the fruit 

 of silver prune, which determination was again verified by Mr. 

 Pergande, of the U. S. Department of Agriculture, from material 

 furnished him. 



Prof. Wilmon Xewell contributed, in 1800. from Iowa, an article 

 upon The North American Specie- of the Subgenera Diaspidiotus 

 and Hemiberlesia of the Genus Aspidiotus. including Professor 

 Cockerel]'- original description of Aspidiotus howardii and giving 

 as it- habitat Colorado and New Mexico. 



The next mention we have* of it is from Professor Gillette, of Colo- 

 rado, in his Entomological Report for 1001. when he reports it- occur- 

 rence for the first time upon fruit tree- in western Colorado on the 

 western slope of the Rocky Mountain range. The following year he 

 reported its discovery upon the under surface of the leave- and upon 



