SCIENTIFIC NOTES 
345 
April, '24J 
mite which Blattny had identified as Acarapis. This has been examined by Dr. 
H. E. Ewing, who states that it is beyond question an adult female of Acarapis 
woodi. 
It is not the purpose of this note to make any interpretation of these findings but 
merely to bring them to the attention of interested persons in this country, thus pay¬ 
ing a slight tribute to the scientific work now being undertaken along beekeeping 
lines in this new European republic. One can not, however, avoid mention of the 
fact that there is still much to learn regarding the interrelationship of Acarapis and 
the bee and that the cause of the Isle of Wight disease is still a problem worthy of 
attention. This does not in any degree indicate a reduction of the loss from this 
disease, nor justify any relaxation in preventing its introduction into America. 
E. F. Phili.ips, Bureau of Entomology 
Thrips on Box Elder. About the middle of August, 1922, in passing through Box 
Elder County, Utah, I observed a very conspicuous discoloration of the leaves of Box 
Elder trees, especially within the limits of Willard. The most seriously affected 
leaves were generally high in the trees or at the end of long shoots. The discoloration 
was silvery and many trees were badly affected throughout-—even partially defoli¬ 
ated. In Salt Lake County the condition was much less prevalent but quite com¬ 
mon, especially near Magna, In 1923 the injury appeared again in Salt Lake 
County and was also noted near Prescott, Arizona. The causative agent is a small 
brownish thrips. Specimens sent to Mr. J. D. Hood have been provisionally re¬ 
ferred to Scirtothrips citri. 
Wyatt W. Jones 
