45 



During- the following autumn correspondence was received from 

 Mrs. .7. Sampson, Gordonsville, Va., regarding the occurrence of this 

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

 in that locality. 



November 10 of the same year Mr. AV. D, Philbrick, Newton 

 Center, Mass., wn'ote that this species, specimens of which were 

 received, was pi'esent in his violet beds, and that they are usually 

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

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

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

 the flowers. 



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

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

 in their violet houses during the summer of 1807, and that they were 

 introduced through the purchase of plants from elsewhere. They gave 

 considerable trouble that season, and the following 3'ear they occurred 

 in vast numbers. Of their occurrence our correspondents wrote: 



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

 fouglit them constantly from i)r(jpagating beds down to the i^resent 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, ])ut he had heard nuich talk concerning its great 

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

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

 were not found in altundance. 



February 27, 1800, Mr. W.V.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 

 1800 until October 18, when Dr. James Fletcher wrote that it was 

 reported to l)e 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 pu1)lished 

 in various florists' periodicals during the year 1808 led to its general 

 identification in many greenhouses, and our correspondent Avas awaro 

 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 lU, 1000, Miss Frances Roberts, Providence, R. 1., sent 

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

 beds of the "'reeiihouse were stated to Ix^ in ideal condition and the 



