ECONOMIC WORK AGAINST HOWARD SCALE. 87 



Mr. J. B. Smith stated that this sawfly occurs in Xew Jersej^ 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. 



(AspidiotK.s Jtoicitnlii Ckll.) 

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



It is my opiDortunity to report the hrst economic work against a 

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

 ih doing groat damage to orchard trees in parts of Colorado and other 

 jioints in the West. 



The insect has been previously reported in various entomological 

 publications, but uj) 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 exi)eriments for its control, and it is upon these pre- 

 liminary tests 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. (xillette, 

 on August 31, 1894. These first specimens were taken by Professor 

 (xillette 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 Xew 

 Mex^ico 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 species, Aspidiotus hoicardii Ckll., in an 

 original description published in the Canadian Entomologist, Volume 

 XXVII, page 1() (1895). 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. AVilmon Xewell contributed, in 1899, from Iowa, an article 

 upon The Xorth American Species of the Subgenera Diaspidiotus 

 and Ilemiberlesia of the (xenus Aspidiotus, including Professor 

 Cockerell's original description of Aspidiotus hoicardii and giving 

 as its habitat Colorado and Xew ]\Iexico. 



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

 rado, in his Entomological Report for 1901, when he reports its occur- 

 rence for the first time upon fruit trees in western Colorado on the 

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

 reported its discovery upon the under surface of the leaves and upon 



