INSECTS AFFECTING PARK AND WOODLAND TREES 1 75 



Linn., and Its young. This species was very abundant at the time of the 

 outbrealc in 1897, and its grubs were observed in considerable numbers 

 crawHng about in the vicinity of infested trees. The larger i 5-spotted lady- 

 beetle, Anatis ocellata Linn., was also associated with the preceding 

 in feeding on this plant louse. It occurred in considerably smaller num- 

 bers, and was therefore not so valuable. The young of syrphus flies and of 

 lace-winged flies were also observed on the infested trees, and undoubtedly 

 did much towards checking the pest. 



Remedial measures. Ordinarily, this species will be kept in check by 

 its natural enemies, and active remedial measures will not be necessary. 

 This pest is capable of causing very serious injury, and when not kept 

 well in check by natural agents, it shouKl be controlled by spraying with a 

 kerosene emulsion or a soap solution. Thorough treatment with either of 

 these substances, taking special pains to throw the insecticide on the under 

 surface of the leaves, will reduce its numliers materially. 



Bibliography 

 iSgS' Lintner, J. A. Ins. N". Y. 13th Rep't. 1897. p. 362 



Painted maple aphid 

 Drcpanosiphum acerijolii Thos. 



A pretty winged, red e}'ed, black and white marked plant louse, together with pale 

 yellowish wingless young, may be found on the under surface of soft maple leaves, spe- 

 cially on those near the tips. 



This little plant louse appears to be generally distributed throughout 

 the -State, and is usualh' jjresent in small numbers on most of the soft 

 maples. Occasionally it is abundant enough to cause considerable injury. 

 This was true in and aliout Albany in 1S97, at which time a number of 

 species of plant lice were unusualh" abundant. This form was observed 

 by the writer in early September, 1S99, at Onondaga \'alley, Syracuse, 

 where many of the leaves of the soft maple had fallen and those in the 

 upper portion of the trees were badly shriveled. Abundant honeydew was 

 observed on the foliage and as the trees were badly infested with this plant 



