EXPERIMENT STATION BULLETINS. 



237 



The New York Plum Scale, Lecanium cerasifcx Fitch. 



Slingerland, M. V., Cornell Agr. Exp. Sta. Bui. 83, 1894. 

 Howard, L. O., Year-book U. S. Dept. of Agr. 1894, p. 272. 



Smith, J. B., Ann. Rep. N. J. Agr. Exp. Sta. 1894, pp. 500-601. 



Lowe, V. H., Ann. Rep. N. Y. State Exp. Sta. (Geneva) 1894, p. 732. 



CockereU, T. D. A., Can. Ent. Vol. xxvii, p. 60, 1895. 



Lowe, V. H., Ann. Rep. N. Y. State Exp. Sta. (Geneva) No. 14, 1895, pp. 



574-593. 



N. Y. State Exp. Sta. Bui. 136, p. 583-6, 1897. 



MSS. Thesis for degree of M. S. in Michigan Agr. College. 



THE PEACH LECANIUM. 

 (Lecanium nigrofasciatum Pergande.) 



A scale that for many years has been known in the states south of us is the peach- 

 scale or peach Lecanium, long thought to be identical with the peach-scale (Lecanium 

 persicw) of Europe, but separated from that species and described by Mr. Theo. 

 Pergande of our National Department of Agriculture.* So commonly has this pest 

 been found on peach, that it is known as the peach scale although it is by no means 



L_ 



Fig. 5. — Peach Lecanium. L. nigrofasciatum. Adult female greatly enlarged. Original. 



confined to the peach as a host-plant, being found also on cultivated plum, native plum, 

 Primus simonii, sugar maple, Acer pseudoplatanus, Acer rubrum drummondii, Cratcegus 

 (thorn), sycamore, Bromelia, Lindera benzoin, Olive and Vaccinium. It was found 

 on soft maple in Michigan and probably on some other host-plants. While it has not. 

 as yet, been sent to us on peach or on any fruit trees, it is likely to be found on fruit 

 trees at any time. In appearance this scale is somewhat different from the apricot 

 scale and most of the fruit scales of this State, being small for a Lecanium and quite 

 uniform in size and form. Specimens were received from Indiana on March 22, 1901, 

 in perfect condition for study. 



The scales are reddish-brown, elevated oval or pyriform. The elevation being nearly 



* Bulletin 18, new series, Division of Entomology, Department of Agriculture. 



