INSECTS AFFECTING PARK AND WOODLAND TREES 20I 



the peach, and Mr Pcrg-ande wrote of it umler the common name of [)cach 

 Lecanium. In his account of this species, lie lias recorded it as occurrinjr 

 on various kinds of plumtrees and also on the suj^ar maple, Norway maple, 

 a variety of the red maple, on apple, Cratae_s:Tus, sycamore, Humelia, linden, 

 benzoin, olive and on X'acciniuni. The writer has met with it almost exclu- 

 sively on hard and soft maples. 



Life history. The life history of this scale insect has been studied in 

 detail by Miss Mary E. Murtfeldt of Kirkwood Mo., and the following is 

 taken from her account of the insect in that latitude. She observed the 

 species May 2 on a young Lombard plumtree, and at that time the twigs 

 and smaller branches were incrusted with the pest. The scales were filled 

 on the 20th with fully developed eggs, but the young did not appear till 

 June 10, and by July 15, hatching was completed. By this time the earlier 

 appearing individuals had nearly all become established on the leaves and 

 transformed to male pupae. July 22, winged males appeared in the rearing 

 jar, showing the pupal period to be about a week, and Aug. 22, hundreds 

 of them were to be met with as well as fresh pupae and active young, on 

 the leaves. The male appears to live about a week. Sep. 5, Miss Murt- 

 feldt found that the males had disappeared and that the females had 

 attached themselves to the bark of such twigs as were still somewhat 

 vigorous. 



The above account agrees very closely with our observations about 

 Albany. The young began to appear in 1901 about June 14, and b\- July 

 15 they were about V50 inch in length. July 16, 1902, the young were very 

 abundant on the greener shoots near the base of the leaves and on the 

 base of the leaf petioles. They are frequently arranged along the larger 

 veins of the leaves on both the upper and lower surface, and they also 

 cluster on the younger twigs. The species appears to breed over an 

 extended period, since a few very young were found early in September, 

 1902, at which time honeydew was excreted in large amounts. Males were 

 also emerging then in considerable numbers, and the numerous empty 

 scales indicated that they had begun to appear some time before. The 



