INSECTS AFFECTIXr, PARK AND WOODLAND TUEES 



641 



branches of twij^rs, generally lU'ar the hasc of huds or leaf scars. Tlie e<;j^s 

 resemble those of the common api^le plant K)use, Aphis mali I'abr., 

 thoiiu-h they are considerably smaller. The youns^- stem mother is but 

 slii^htly lar<4er than the e^i^- anil appears in the latitude of Washington 

 about the middle of April. She is a dull black color covered with a 



FiR. 174 Hor 

 a-dorsal view ; i^ve 

 arrangement of pores ; 

 Ent. Tech. Ser. 9, igoi) 



1 m e 1 i d i s, 3d Reneration, fourth or final stage: 

 ew; t~lateral view , rf-dorsal view, showing the 

 end of body. (After Pergande, U. S. Dep't Agric. Div. 



delicate, slightly bluish secretion and ornamented \vith a waxy secretion as 

 shown in figure 172. She molts three times, attainmg maturity the middle 

 of May and from then producing 4-6 young till about the middle of June. 

 The second or winged generation, the young of the stem mother, com- 



