INSFXTS AFFKCTING I'AKK AND WOOULAND TUF.ES 



6-! 3 



five to lo eL,fL,'s eUpositcd as previously suited, uiul lluis llie life cycle of this 

 extremely interestin>,r form is completed. 



Fisr 176 Ilormnpliis h .1 111 a in e I i d i s , sexual Keiicr.ltion :,. -young larva ; «-malc ; 

 ^-femak-, nuich enlarged. ^.\(ter Per;ande, U. S. Dcp't A;;ric. Div. Ent. Tech. Ser. 9, 190O 



Spiny witch-hazel gall 



Ha>iiaiiu-/isU-s sp/nosus Shinier 

 Many spined, green or reddish galls occur on wilchha/t-l from June to the latter [larl 

 of OctoUer. 



Fig. 177 H a m a m e i i s t e s s p i n o s u s : 

 a-winter egg much magnified; /'^twig of 

 witch-hazel with young flower buds and 



CRKS in position, natural size (After Per- Fig. 178 H .. m a m e 1 i s t e s sp i n OS u s ; <i = mature gall : ^-iection of 



gande, U. S. Dep't Agric. Div. Ent. Tech. same, natural size (After Pergande, U. S. llept Agric. Miv. Ent. 



Ser. 9, igoO Tech. Set. «. 19.. i» 



Our knowleds^e of this insect is due almost entirely to lon^J continued 

 patient investis^ations liy Theodore Pers^ande of the Ihireau of l-"ntomolooy. 



