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 A'eiu Yorker of May 10, 1890, a more 



Fig. 13 LECANiuM TULiFiFEKAE (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 — ^J^^h 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 



