ie 
For a general account of the distribution of this scale in this country 
and also in Kurope, the reader is referred to the article cited. The 
importance of this scale to our horticulturists has increased rather 
than diminished by the record of the two or three months which have 
elapsed since public attention was first drawn to it by the article in 
question. : 
It may be well therefore to repeat the ideas expressed in the open- 
ing paragraph of the article in Science, namely, that it is certainly 
in order, in view of the activity and zealousness displayed by several 
European countries in excluding American fruits and plants upon the 
pretext of contamination by the San José scale, to draw attention to 
and emphasize the fact that a dangerous, and perhap a very danger- 
ous, European scale insect, Aspidiotus 
ostreeformis Curtis, has recently become 
well established in this country from im- 
ported European stock. Aspidiotus os- 
treeformis is awell-known pest on various 
fruit trees in Europe, has a very wide dis- 
tribution, is very similar to the San Jose 
scale in appearance and habits, and is 
liable to be almost if not equally as mis- 
chievous, judging from the examples of 
badly infested material which have come 
to the office of the Division of Entomology 
at Washington for determination, and 
from reports already received of actual 
damage in orchards. In other words, we 
have already recently received, and the Fig. 1.—A spidtotus ostremformis: a, in- 
5 5 A ‘< : fested twig, natural size; 0b, life size 
importation is liable all the time to be — gematescale; c, half-grown femalescale; 
repeated, a scale insect probably. as un- = @ full-grown female scale; ¢, full-grown 
desirable as the San JoSe seale,and which — 22 S*les F. female scale from Delow 
3 g, tale scale from below; c-/, greatly 
if equally widely distributed and equally enlarged (original). 
actively exploited would doubtless as- 
sume similar importance; with this advantage to us, however, that 
coming from Europe to America there could be legitimately no restric- 
tions upon our commerce with Hurope as a consequence. 
Since the article referred to above appeared in print opportunity has 
offered to make some further studies of the habits of the species, given 
below, and to these are added a description of the male and female 
scales and the adult female insect. In the meantime also several 
additional localities for this scale have been brought to notice by various 
correspondents of the Division of Entomology, U.S. Department of 
Agriculture. A brief summary of the new records follows: 
From Canada it has been received from Mr. John Dearness on apple 
at London, Ontario, July 20, and on plum at Kingsville, Ontario, August 
9, and from Mr. W. Lochhead on plum also from Kingsville, Ontario, 
