214 NEW YORK STATE MUSEUM 
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 



Fig. 13  LECANIUM TULIPIFERAE (original). 
serious outbreak of this species is recorded at River Edge, Bergen 
county, N. J. Three years before, the tulip-trees in that vicinity were 
attacked by 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 growing wild had been killed. Serious injuries to tulip- 
trees in 1896 at Hartford, Ct., have been reported by Dr Sturgis, of 
the Connecticut agricultural experiment station, and Dr J. B. Smith, of 
the New Jersey agricultural experiment station, the same year observed 
a serious attack by this insect in his state. 
Description. The adult females are among the largest of those 
belonging to the genus. Some received measured ;%, inch in diameter. 
The scale is light brown, mottled with dark brown, and very con- 
vex. The under surface is concave, and in the examples before me, 
there are two pairs of ventral, transverse, white lines composed of 
short cottony filaments, one on each side near the middle and the obli- 
que pair nearer one extremity, probably the anterior. Both are inter- 
rupted in the middle. The young at this time (October) range in color 
from a light brown to almost black. The abdominal segments are 
sharply defined, the caudal extremity is notched, and from the tips of the 
last segment there extends a pair of delicate filaments. The young have 
a general resemblance to tiny trilobites. 
Life history. No signs of eggs were to be seen, though Prof. Cook 
describes them as small, yellow and oval. On examining the adults, a 
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