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 1S87. 



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, D i a s p i s 

 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- 

 f o r m i s 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, Ooleophora 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, Oryptorhynchus 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 Biley 

 Bud moth, Tmetocera ocellana Schiff . 



