INSECTS AFFF.CTINC PARK AXD WOODLAND TREES I95 



The hod)- is clont^ated, p)rifonn durin:^' cl^l;' la\inLi' ''i'""l contracts to a 

 globular or flattened shape afterwards or in the winti-r. 



Natural enemies. This s])ecies is subject to attack liy .a numljer of 

 natural enemies ; amony the more impoilant may be mentioned several 

 species of ladybeetles, particularly the 1 5-spotted one, Anatis ocel- 

 lata Oliv., and the two-spotted form, Ad alia l)ii)unctata Linn; 

 both species have been observed by tht- writer in considerable numbers 

 around infested pines in Washington jjark. The twice stabbed ladybeetlc, 

 C h i 1 o c o r u s b i v u 1 n e r u s Muls., and the spotted ladybeetle, M e g i 1 1 a 

 maculata De G., have also been recorded as i)re}ing on this aphid. 

 Syridiiil larvae and ant lions, Chr)-so|)a and Hemerobius, are recorded 

 bv Mr Storment as being verv destructive; to this insect. 



Remedial measures. Tliis insect is easily reachetl by sprays, antl as 

 previously noted I)r Y.. B. .Southwick has found that \-ery stiff sjira^'s are 

 efficient in combating this pest. Mr .Storment states that thorough spray- 

 inf with kerosene emulsion in Ma\- pro\-ed \-er)- efficient. The standard 

 emulsion was probably diluted with q parts of water. In case it was 

 undesirable to use kerosene emulsion, it is probable that the insect would 

 be equally susceptible to a whale oil soap solution, i pound to 4 gallons 

 of water, or even a forcible spray of cold water would wash off large 

 numbers of the insects. This latter could be used very well where a 

 nearby hydrant afforded sufficient head. 



Bibliography 

 1S56 Fitch, Asa. Ins. N. Y. ist Rt-p't, p. 167-09 

 1885 Lintner, J. A. Ins. X. Y. 2d Rt-ii't. p. 180-87 

 1898 Storment, E. L. Ins. 111. 20th Rcp't, :11.x. p. .^-24 



Alder blight aphid 



rcnip/i/'ons fcssf/ia/ns Fitch 



Conspicuous cottonylike liunc lu-s hanging -Torn the unilcrside of alder stems, are 

 very characleristic of this insect. 



This species is exceedingly abundant in sections of the Ailirondacks 

 during ■ July and August. It occasionally occurs on cultivated alders in 



