Vol. XXVlii] ENTOMOLOGICAL NEWS. 41 



Jersey. The curled condition of the foliage due to larval activities is 

 quite a common occurrence on boxwoods imported from Holland and 

 it was undoubtedly introduced from this country. It is probably also 

 established in other parts of New Jersey, especially on estates where 

 boxwood hedges and plantings are common and surely must occur in 

 other Eastern States too, inasmuch as it has been mentioned at differ- 

 ent times in the News Letters of the Federal Horticultural Board as 

 being found on imported boxwoods. Considering its method of over- 

 wintering, it is evidently being introduced more or less regularly every 

 time imported boxwoods are received in this country. 



In Smith's "Cat. Ins. of N. J.," p. 109, can be found the following 

 note : "Psylla buxi Linn. An imported species on Buxus scmpen'ircns, 

 which has been found in Jersey City." This does not however lead 

 one to assume that it is established in New Jersey. In Van Duzee's 

 Check List of the Hemiptera of America, North of Mexico, it is not 

 recorded. 



A brief account of Psyllia buxi in Holland and its importance as a 

 pest can be found on page 176 of Vol. I, "Ziekten en Beschadigingen 

 der Tuinbouwgewassen" by M. Van Den Broek en P. J. Schenk. This 

 article states that adults appear in May and June depending on the 

 temperature and locality and that later about the time the plant has 

 formed new buds for next season, each female lays from one to three 

 eggs on the leaves at the tips of the branches. These hatch before- 

 winter and the nymphs which are covered with a white, waxy sub- 

 stance hibernate under the buds in the axils of the leaves. When the 

 buds develop in the spring, the whitish masses covering the nymphs 

 are readily seen. The injury resulting from the activity of the 

 nymphs consists in a curling of the 1 leaves so that they resemble little 

 cups or hollow hemispheres. 



In New Jersey adults were taken about the middle of July and also 

 in August and the tips of the branches of many plants showed the 

 characteristically curled leaves. According to the Dutch authors, good 

 results were obtained in the way of control by spraying in the spring 

 with a 7.5 per cent, of soluble carbolineum emulsion. As far as is 

 known, no remedial measures have ever been attempted against this 

 insect in New Jersey. In fact, many persons have assumed that the 

 peculiar curling of the leaves is characteristic of boxwoods and cer- 

 tainly no great disfigurement takes place provided the infestation is 

 slight. 



H. B. WEISS & E. L. DICKERSON, New Brunswick, N. J. 



The O. B. Johnson Entomological Collection. 



Orson Bennett Johnson, professor emeritus of zoology in the Uni- 

 versity of Washington, has given the university his valuable entomo- 

 logical collection. Science, Nov. 3, 1916, p. 635. 



