45 



During the following autumn correspondence was received from 

 Mrs. J. Sampson, Gordonsville, Ya., regarding the occurrence of this 

 species in her violet beds, this being the most troublesome violet pest 

 in that locality. 



November 19 of the same year Mr. W. »D. Philbrick, Newton 

 Center, Mass., wrote that this species, specimens of which were 

 received, was present in his violet beds, and that they are usually 

 noticed to be quite plentiful when the plants are first brought in 

 under glass in the fall from the field where they are grown in the 

 summer. This species, he reports, is most abundant on the petals of 

 the flowers. 



The following day Messrs. Thomas De Voy & Son, Poughkeepsie, 

 N. Y. , sent specimens with the information that these insects appeared 

 in their violet houses during the summer of 1897, and that they were 

 introduced through the purchase of plants from elsewhere. They gave 

 considerable trouble that season, and the following year they occurred 

 in vast numbers. Of their occurrence our correspondents wrote: 



The increase of these terrible pests is not owing to neglect on our part; we have 

 fought them constantly from propagating beds down to the present time, using 

 tobacco smoke, s°"_ water, and tobacco dust. These remedies hold them in check 

 somewhat if constantly applied, but the insects appear to breed by the million in a 

 single warm day or night. Several of the growers in this vicinity are troubled like 

 ourselves with this pest, and it is beginning to alarm us, for it seems impossible to 

 eradicate them from houses once infested. 



December 12 Mr. John G. Bahret, Poughkeepsie, N. Y. , sent speci- 

 mens obtained from a neighboring greenhouse. His own greenhouse 

 was free of the pest, but he had heard much talk concerning its great 

 damage in his vicinity. The cold weather at the time of writing- 

 appeared to have had considerable effect upon the little pests, as they 

 were not found in abundance. 



February 27, 1899, Mr. W.Y.Y. Powers, Cornwall-on-Hudson, N. Y., 

 sent specimens of the adult, taken on hothouse violets at that place. 



No further complaints of injuries by this species were received in 

 1899 until October 18, when Dr. James Fletcher wrote that it was 

 reported to be doing a good deal of harm to violets grown under glass 

 by one of the principal growers of Toronto, Canada. The prominence 

 which was given to this plant-louse in short notes and letters published 

 in various florists' periodicals during the year 1898 led to its general 

 identification in many greenhouses, and our correspondent was aware 

 of the fact that the species was of serious importance in many of the 

 large greenhouses of the United States, including those of Rochester, 

 N.Y. 



February 10, 1900, Miss Frances Roberts, Providence, R. I., sent 

 specimens, reporting the species injurious to violets in that city. The 

 beds of the greenhouse were stated to be in ideal condition and the 



