INSECTS AFFECTING PARK AND WOODLAND TREES 20Q 



dition of alTairs | pi. 12, fiy. 6|, were received Oct. i i, 189S, from Mr Alfred 

 Pell, of Highland Falls N. Y., with an incjuiry as to the nature of the 

 attack. The insects were so crowded on portions of the hark, that the old 

 scales were huddled together and badly deformed. Under a lens it was 

 seen that thousands of young hatl (-stablislic'd themselves in the immediate 

 vicinity of their parents, almost covering the bark in many places, while a 

 few occurred along the veins of the leaves. The young were still issuing 

 from the parents, as a number of paler individuals were to be seen crawling 

 over the twigs. Branches of Magnolia soulangeana batlh- infested 

 by this species have also been received recently from Fishkill. 



Earlier injuries by this species. In 1878 this scale insect was men- 

 tioned by Professor Cook as one that frequently destroys tuliptrees in 

 Michigan. He states it was so abundant in 1870 on the college grounds at 

 Lansing Mich., that some of the trees were killed outright and others much 

 injured. In the Rural New Yorker of May 10, 1890, a more serious 

 outbreak of this species is recorded at River Edge, Bergen co., N. J 

 Three years before, the tuliptrees in that vicinity were attacked 1)\- this 

 scale insect, and at the time the notice was written, not only had trees in 

 front yards been rendered worthless, but the lower branches of those grow- 

 ing wild had been killed. Severe injuries to tuliptrees in 1896 at Hartford 

 Ct., have been reported by Dr Sturgis of the Connecticut Agricultural 

 Experiment Station, and Dr J. B. Smith of New Jersey, observed a serious 

 attack by this insect the same year in his -State. 



Description. The adult females are among the largest of those belong- 

 ing to the genus [pi. 12, tig. 6|. Some received measured 3 '^q inch in 

 diameter. The scale is light brown, mottled with dark brown, and very 

 convex. The under surface is concave, and in the examples before the 

 writer, there are two pairs of ventral, transverse, white lines composed of 

 short cottony fdaments, one on each side near the middle and the oblique 

 pair nearer one extremity, probably the anterior. Both are interrupted in 

 the middle. The young [pi. 12, fig. 8, 9] at this time [October] range in 

 color from a litrht brown to almost black. The abdominal segments are 



