1923] 
A Note on a Recently Introduced Leafhovper 
155 
A NOTE ON A RECENTLY INTRODUCED LEAFHOPPER. 
By Geo. W. Barber, 
Bureau of Entomology, U. S. Dept, of Agriculture. 
On July 21, 1919 the writer took a single specimen of Allygus 
mixtus Fabr. on the trunk of a beech tree at Medford, Mass. 
This specimen was determined by Messrs. Sanders and DeLong 
and a note of its occurence published by them (8). The species 
was also noticed in a local list published by the writer (9). 
During the season of 1920 over forty specimens of the insect 
were taken from the same tree, the occurence ranging from July 
16 to September 3. No specimens other than these were seen. 
Hundreds of specimens were taken from this tree during 1921, 
and a few near by and in adjoining towns from the middle of 
July to the middle of September. 
So far as these collecting records go it would seem that this 
insect was rapidly gaining a foothold in this locality, at least one 
thriving colony having become well established. However, 
during 1922 only two specimens were captured and but one of 
these on the tree mentioned heretofore. 
This species is not uncommon in Europe and northern 
Africa where it occurs quite generally as the following distribution 
record by Oshanin (6) will show; Sweden, Germany, England 
France, Spain, Italy, Austria, Hungary, Roumania, Algeria, 
Tunis, Finland, and Russia. Specimens from Germany are in 
the writer’s collections. It is a common species in England 
according to Buckton (4), and Edwards (5) records that it feeds 
on the oak. So far, the writer has not taken the insect from oak 
in Massachusetts but the young have not been observed. 
Allygus mixtus was originally described by Fabricius (1) 
in the genus Cicada. Subsequent writers placed the species in 
the genera Jassus and Thamnotettix until Scott (3) described the 
genus Allygus. This name had been proposed by Fieber (2) 
but it seems that he had given no description of it. 
