64 



ities, since for a number of years trees were sold to patrons in the 

 State from nurseries which later proved to be infested. In fact, as was 

 recently brought out in Mr. Kirkland's commendable paper on the 

 insect, published in the Massachusetts Crop Report for June, there is 

 great probability that the owners of one of the nurseries of the State 

 have been distributing stock which they knew to bear the scale. 



With the single exception of these nurserymen, who have, moreover, 

 allowed a large colony of the insects to remain in their nursery without 

 making any attempt to reduce it, the nurserymen and orchardists of 

 the State have shown commendable energy in their efforts to eradicate 

 the pest, and have no doubt in great measure prevented its spread. 



In connection with the foregoing remarks on the San Jose scale, it 

 should be stated that Aspidiotus forbesi and Aspidiotus ancylus, two 

 congeners of perniciosus, now notorious because of their resemblance 

 to that species, have both been found in Massachusetts as well as a 

 third, aspidiotus femaldi of Professor Cockerell's manuscript, a species 

 which in some respects very closely resembles the San Jose scale. 



Aspidiotus ancylus is a very common insect in this State, occurring on 

 a large number of food plants, and has in a few instances been very 

 injurious. The most notable case that has come under the writer's 

 observation is a young apple orchard in Maiden, in which nearly every 

 tree was infested with the species, some very abundantly, while one 

 was dying from the attack. 



Aspidiotus forbesi has been found by Mr. Kirkland in a single 

 instance at the Shady Hill nurseries on apple trees received from 

 Geneva, N. Y. 



Aspidiotus femaldi occurs on a row of Honey Locust trees in the 

 Charles Bank Park in Boston. The same trees are also badly infested 

 with Aspidiotus ancylus. 



On January 26, 1898, Mr. A. H. Kirkland sent the writer specimens 

 of a scale insect on Prunus mume from the Arnold Arboretum, Jamaica 

 Plain, Mass., which on examination proved to be the new peach scale, 

 Diaspis amygdali. The infested trees were received from Japan in the 

 spring of 1897, and being in an unhealthy condition were planted in 

 an out of the way place, where they had remained for nearly a year 

 previous to the date mentioned, when they were found to be nearly all 

 dead. Specimens of the insect were later sent to Dr. Howard, who 

 confirmed the writer's identification, stating also that Mr. Jack had 

 already sent him specimens which had been determined as Diaspis amyg- 

 dali. Another tree, Prunus subMrtella, received from Japan on April 

 17, 1894, is infested with the scale, but does not appear to be seriously 

 injured. An explanation of this may be found perhaps in the fact that 

 the tree is located on a southern slope where the sun beats down 

 strongly in the early spring, making the spot very warm during the 

 day, while at night it is severely cold. Visiting the tree on March 28 of 

 this year the writer found nearly all of the over-wintered females alive, 



