8o NEW YORK STATE MUSEUM 



Woolly beech leaf aphis (Phyllaphis fagi Linn.). 

 This rather inconspicuous plant louse, occurring on the underside 

 of beech leaves, is most easily recognized by its woolly covering. 

 It has been abundant on purple beeches in Washington park, 

 Albany, N. Y., for the past decade, occasionally becoming very 

 numerous, as was the case in 1909, tliough never causing per- 

 ceptible curling of the foliage. A dying, small tree observed had 

 the leaves nearly destroyed by this plant louse. 



Woolly larch aphis (Chermes strobilobius Kalt.). 

 This species continues abundant upon larches in Washington 

 park, Albany, N. Y., though it is not especially injurious. The 

 winter is passed in the egg state, over 200 having been counted 

 in an egg mass of moderate size. The young appear in early 

 May and settle on larch needles, at which time they somewhat 

 resemble grains of black gunpowder. They increase in size 

 and in the course of a few weeks, excrete an abundance of white, 

 woolly matter, giving a very characteristic appearance to in- 

 fested trees. 



Pine bark aphis (Chermes pinicorticis Fitch). 

 This species continues abundant on pines in Washington park, 

 Albany, N. Y., and is probably responsible in large measure for 

 the gradual destruction of two groups of young pines, individual 

 trees of which have died from time to time during the past 

 decade. This insect winters as yellowish brown eggs, well pro- 

 tected by the copious, waxy secretion, young appearing in the 

 latitude of Albany, N. Y., from the middle to the latter part 

 of May. The full-grown female is a dark grayish purple and 

 about 1/32 of an inch long. This species has been the occasion 

 of complaint from several sections of the State and has also 

 proved to be a pest on seedling pines in forest nurseries. At- 

 tack by this plant louse is very likely to be followed or accom- 

 panied by bark borer injury. It has also been observed on bal- 

 sam. This species is particularly subject to attack by lady- 

 beetles. 



Woolly pine aphis (Schizoneura pinicola Thos.). 

 This species; kindly identified by Mr Pergande, through the 

 courtesy of Dr L. O. Howard, was brought to notice by State 

 Forester C. R. Pettis in October on account of its abundance on 

 the roots of seedling pines grown in forest nurseries at Lake 

 Clear Junction, N. Y. The plant lice, he stated, were very 

 abundant upon the roots. Samples submitted for examination 



