Report of Entomologists of Experiment Station. 575 



and habits of the insect, together with remarks as to its appearance, 

 and, at Mr. L, O. Howard's suggestion, reconiinendiug dilute kero- 

 sene emulsion as a remedy. 



In the Rural New Yorker for November 10, 1894, Mr. M. V, 

 Slingerland, of the Cornell Agricultural Experiment Station, pub- 

 lished a more elaborate account of the insect, recommending kero- 

 sene emulsion as a remedy, to be used not weaker than one part of 

 the emulsion to four parts of water, and not stronger than one part 

 of the emulsion to three parts of water. In December, 1894, 

 Mr, Slingerland published Bulletin 83 of the Cornell Agricultural 

 Experiment Station, entitled "A Plum Scale in Western New 

 York." 



Mr, L, O. Howard, Entomologist of the United States Department 

 of Agriculture, speaks of this insect in the Year Book of the 

 United States Department of Agriculture for 1894, page 272, stating, 

 among other things, that this scale resembles the Peach Lecanium 

 in general appearance. 



In the annual report of this Station for 1894, the writer has a 

 brief preliminary report of experiments with kerosene emulsion as 

 a remedy for this new pest. 



The next and last publication concerning this insect in western 

 New York that has come under our observation, is by Mr. M. Y. 

 Slingerland, in the Rural New Yorker for April 13, 1895, and is 

 entitled " Latest News on the Plum Scale." 



Appearance of the Scale in Winter, 



Generally speaking, two sizes of the scales may be found in this 

 latitude during the winter, namely, the large oval ones, which are 

 the remains of the mature females of the previous season, and the 

 small hibernating scales which are destined to carry the brood over 

 to the coming spring. The old dead scales are very conspicuous 

 and hence easily recognized, They are dark brown in color and vary 

 in length from one-eighth to three-sixteenths of an inch and are 

 decidedly oval in outline. They are not very securely fastened to 

 the bark but rub off easily, and in time would be blown off by the 

 wind. Fig. 9 is from a photograph of some of these scales enlarged 

 to about four times their natural size. When one of these scales 

 is forcibly removed it leaves a white mark upon the bark together 

 with a white powdery substance which is made up of thousands of 



