122 NEW YORK STATE MUSEUM 
bage, cauliflowers and radishes about New York city, according 
to Peter Henderson, who records the destruction of tens of thou- 
sands of acres in 1887. 
The destructive pea aphis, Nectarophora pisi Kalt, is a 
species which has caused widespread loss to extensive pea- 
growers in the Atlantic states and has led many to abandon the 
late varieties in order to escape its ravages. 
RECENTLY INTRODUCED SPECIES WHICH MAY BECOME VERY 
DESTRUCTIVE 
The sinuate pear borer, Agrilus sinuatus Oliv., is estab- 
lished in the vicinity of New Brunswick N. J. 
The recently imported West Indian peach scale, Diaspis 
pentagona Targ., is very injurious where established in the 
southern states and is known in a few localities in Massachusetts. 
The European fruit tree scale insect, ASpidiotus ostreae- 
formis Curt., is established in New York State and in a number 
of other localities in this country, but as yet has not proved 
markedly injurious. 
The wheat sawfly, Cephus pygmaeus Linn., has become 
established in several localities in this country, but has not proved 
very injurious, though it is a well known enemy of wheat in 
Europe. 
An interesting case-bearer, Coleophora limosipennella 
Dup., was brought to the speaker’s notice last year, when it was 
inflicting considerable injury on Scotch elms at Brooklyn. It is 
apparently a recently introduced species. 
The willow and poplar curculio, Cryptorhynchus lapathi 
Linn., has become established in a number of widely separated 
localities and has proved quite injurious to nursery and other 
young trees in particular. 
OTHER INTRODUCED SPECIES 
Most of the forms included in this list are quite destructive 
at times, though not as a rule so injurious, or likely to become so, 
as those in the preceding lists. Most of them are so familiar 
that comment is unnecessary. 
Species affecting fruit trees 
Pear midge, Diplosis pyrivora Riley 
Bud moth, Tmetocera ocellana Schiff. 
