INSECTS AFFECTIXG PARK AND WOODLAND TREES 2O9 



dition of affairs [pi. 12, fig. 6|, were received Oct. i i, 1898, from Mr Alfred 

 Pell, of Highland P'alls N. V., with an inquiry as to the nature of the 

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

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

 seen that thousands of young had established 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 j'oung were still issuing 

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

 over the twigs. Branches of jNI a g n o 1 i a s o u 1 a n g e a n a badly 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 Nci^.' 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 vicinit)- were attacked l)y 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 

 E.Nperiment 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, hg. 6 1. Some received measured s/i^ inch in 

 diameter. The scale is light brown, mottled with dark Iiroivn, 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 filaments, one on each side near the middle and the tjblicpie 

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

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

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



