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NEW YORK STATE MUSEUM 



conspicuous waxy tufts [fig. 181]. They settle in folds on the underside 

 of the developing leaves and produce pseudogalls caused by the area 

 between the veins bulging and forming ridges or corrugations [fig. 182]. 



These galls are reddish brown, 

 soon changing to reddish or crim- 

 son. The young attain their growth 

 by the end of April or early in May 

 and then produce a fifth generation, 

 which is sometimes abundant enough 

 to seriously injure the trees. This 

 latter, on attaining its development, 



lUtes spinosus, 6th or sexual genera- . 1 • t 11 



, of young larva: *-the same denuded; migrates carly HI Juuc bacK to 



nt of pores; r=tarsus ; <:'=lateral tubercle 

 and waxy rod; f=apex of lateral tubercle, much enlarged the witch-haZel, wllere tllC SCXUal 

 (After Pergande, U. S. Dep'l Agric. Div. Ent, Tech, Ser. 9, ■ rr n T • 11 



1901) 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 



6 



Fig. 184 Hamamelistes s p i n o s u s : <j=dorsal view of male ; ^=antenna ; c=dorsal view 

 of female ; rf-antenna ; f-ventral-lateral secretory gland, much enlarged (After Per- 

 gande, U. S. Dept. Agric. Div. Ent. Tech. Ser. q, 1901) 



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

 shown at figure i 84. 



