18 
and on bark from the same locality, also on bark and twig from St. Cath- 
erines, presumably from different localities, all sent under date of Sep- 
tember 22. 
From Michigan it has been received from several localities. Under 
date of July 24, Mr. R. H. Pettit, of Agricultural College, Mich., sent 
examples from South Frankfort, collected in July, 1899; from Douglas, 
collected April, 1899; from Mears, collected March, 1897, and from Ganges, 
collected March, 1897. Additional specimens also have been received 
from South Haven, Mich., from Prof. L. R. Taft and Mr. Pettit, the 
material having been communicated by Mr. 8. H. Fulton, South Haven. 
As described by Professor Taft, the infested orchard is about 4 miles 
south of South Haven, and comprises some twenty trees only. One of 
these died in midsummer, apparently from the effects of the scale; 
and the owner removed three or four others which were badly affected, 
spraying the remainder with kerosene emulsion. Mr. Pettit assures us 
that this scale insect will kill trees, reporting several large soft maple 
trees (Acer dasycarpum) to be in bad shape, two of them being killed 
outright as a result of its attacks. As reported to Mr. Pettit by the 
owner of the orchard, Mr. Fulton, at South Haven, the infested stock 
came from Lockport, N. Y., the trees being purchased some nine or ten 
years ago, which would seem to connect the Michigan infestation 
directly with the New York stock described in the article in Science. 
A new and unexpected locality for the scale is indicated by speci- 
mens received from Boise, Idaho, communicated August 19, 1899, by 
Mr. A. McPherson. The trees attacked are plum trees, and the infes- 
tation is quite serious. The history of the infested stock was not given. 
The infestation in New York, as noted in Science, seems to have been 
the original one in this country, and some inquiry was made as to the 
history of the scale in that State. Mr. George G. Atwood, who has had 
perhaps as much experience with this scale in New York as anyone else, 
writes, under date of July 1, 1899, in response to an inquiry from this 
office, that Aspidiotus ostreeformis was first discovered by him in 
August, 1898, while inspecting nursery trees about two or three years 
of age. At first he mistook the scale for ancylus. Last winter, how- 
ever, while inspecting some of the large orchards of Ontario and Sen- 
eca counties, this scale was found on European plum trees perhaps 
twenty years of age and coming from a nursery established in New 
York fifty years ago. Infested varieties are Reine Cloude de Bavary, 
Bradshaw, and Lombard, and are generally grown by nurserymen, but 
infested stock was present in only three out of one hundred and twenty 
nurseries inspected by Mr. Atwood. It was found also in but two 
orchards. This relates to the material identified by the Division otf 
Entomology. 
He says that, while this scale was discovered by him in New York 
within a little over a year, he believes that it has been present a good 
many years, the varieties which it infests coming from old nurseries, 
