240 NEW YORK STATE MUSEUM 



dition revealing a very serious attack. One side of each twig was nearly 

 covered by the adults while the young fairly swarmed over everything 

 (fig. 20). I have also received twigs badly infested with this scale from 

 Batavia, Patchogue and Flushing, N. Y., and Arlington, N. J. 



Fig. 19 Young of pemphigus tkssellatus foriginal). 



Lecanium armeniacum Craw. One of the interesting features of 

 the year was the detection of this scale, identified by Mr Pergande, in Erie 

 county, N. Y. In response to inquiry about its introduction, Mr Hayes 

 stated that he could not account for it in any manner. The vine upon 

 which the species was found had been planted 10 years. His neighbors had 

 not set out any Californian stock and he had used no fruit from that state 

 for several years. A possible source of introduction is the sending to this 

 state in 1896 of examples of tliis scale infested with Corny s fusca, by Mr 

 Ed. M. Ehrhorn, Horticultural commissioner of Santa Clara county, 

 Cahfornia. This was done, it was stated, in the hope that the parasite 

 would attack the New York plum scale. 



Lecanium cerasifex Fitch. This scale, identified as probably this 

 species by Mr Coquillett, has been very injurious to several soft maples 

 in Albany the past two or three years. The trees have been dwarfed by 

 the attack and each summer are more or less blackened by the copious 

 honey dew secreted by the insects. Many of the limbs were nearly cov- 

 ered with the scales on their under surface and during a portion, at least, 

 of July and early in August the young swarmed over branches and leaves 



San Jose scale. Th\?> ^tst, Aspidiotus pemiciosus Comst., has demon- 

 strated its ability to thrive in the Hudson river valley as far north as 

 Albany, at least. Just across the river at East Greenbush, an infested 



