646 



NEW YORK STATE MUSEUM 



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conspicuous waxy tufts | tii^'. iSi]. They settle in folds on the underside 

 of the developing' leaves and produce pseudos^alls caused by the area 

 between the veins bulying and forming- ridges or corrugations [fig. 182J. 



\\]§^till ' These galls are reddish brown, 



0.'v|_J^_ife:^ SQon changing to reddish or crini- 



-^i son. The young attain their growth 



^-^55 by the end of April or earl)- in May 



'^^^^^^^--^"^ diwd then produce a hfth generation, 



^ which is sometimes abundant enough 



^ to seriously injure the trees. This 



atter, on attaining its developn-ient, 



Fig. 183 HamanieUstes spinosus, 6th or sexual genera- 

 tion : „_dorsal view nf young larva: /. = tlie same denuded ; m igl'ateS Carly lu JuUC l)ack tO 

 sliowing arrangement of pores; f=tarsus; rt'=lateral tubercle ^ ' 



and waxy rod; ,-=apex of lateral tubercle, much enlarged tllC witch-haZcl, wllCrC thc SC.XUal 

 (After Pergande, V. S. Dep't Agric. Div. Ent, Tech, Set. 9, . j- , -, . 



igoi) / generation [ng. 183J is produced 



and the life cycle of the species completed. This last develops rapidly, 

 attaining maturity in two or three weeks and deposits eggs as stated 



Fig. 184 H a m a m e 1 i s t e s spinosus: rt^dorsal view of male : ^=antcnna ; t-=dorsal view 

 of female; (/^antenna ; c=ventral-lateral secretory gland, much enlarged (After Per- 

 gande, U. S. Dept. Agric. Div. Ent. Tech. Ser. g, igoi) 



above. The general appearance of the full grown males and females is 

 shown at figure 184. 



