INSECTS AFFECTIXG PARK AXD WOOULAXD TREES 18/ 



louse may be seen within the cavity. This insect is the mother of the 

 colony inhabitiny^ the gall. I-Our to five weeks after the inception of its 

 growth and during the month of {une, an examination of the interior of the 

 gall shows the adult plant li)us<_: surrounded l)y numerous \-oung in different 

 stages of growth. \\'ithin the gall, among the many occupants are small 

 glistening globules of a sweet liquid or honeydew, excreted by the plant 

 lice. Later the opening into the gall spreads ajiart and permits the insects 

 to escape, and when the tree is badly infested, as stated by Dr Lintner, 

 there are almost showers of honeydew falling from the leaves on the ground 

 beneath. The stones of the walks under the infested tr(_-es in cities may be 

 kept moist and black by this copious excretion. The members of the 

 second generation, as stated by Dr Lintner, are wingless females, parents 

 of the gall-producing geneiation, from which, later in the season, sexual 

 individuals develop and deposit eggs in sheltered places beneath the bark. 

 The winter is passed in this stage and the stem mother appears the follow- 

 ing spring. 



Bibliography 



1S59 Fitch, Asa. ins, X. \. sth Kep't, p. 63-64 



18S7 Lintner, J. A. Ins. X. V. 3(1 Rep't. 18S6. p. 126-28 



Woolly larch aphid 



C/icrmcs sfrolu'lo/u'its Kalt. 



Snow-wliite, woolv aphids or plant lice on larrli nceillcs m May anil June and 

 masses (if purplish eggs at the l)ase of leaf fascicles may be this insect. 



This species is somewhat common on the larches in Albany, and has 

 been under the writer's observation for the past five years. It is occasion- 

 ally exceedingly abundant, and the woody masses excreted In' this plant 

 louse are sometimes so conspicuous as to give a tree the appearance of 

 having been dusted with (lour or starch. This was specially true the latter 

 part of June 1897 [Sec pi. 18, fig. i, 3, 4] 



Life history. The life history of this insect as observed by the writer 

 in Albany is substantially as follows: May 3. 1897. the larches were alive 

 with females and eirgs. Large masses of eggs were to be found at the 



