H2 riVOHill T.VK.VIIA.SUI: 



fiDiu the fii-st week uf Novemlj.H- ou the I'lliununn. As iu mauv other plaut- 

 liie tlie oviparous females oiitmiml>er the uwles. 



(Notes ou tlie life history, the host leiug I'Unmiuia skholdi} 



The eggs Litt-h the first week of April into nymplis which are black iu 

 their general colour. These nymphs feed on the Imds, reaching the alult 

 eouclition the miilello of the Sitme month. The first generation consists entirely 

 of wingless forms, Avhile the second and the following generations include b'>tli 

 winged iUid wingless individuals. The adults of the second generation occur 

 fi-om alxmt 10th day of 3Iay when the gieatest abundance takes place. The 

 .sexnpara:" are probably pi'ovided with wings. Each act of copulation hvsts for 

 iibout four minutes and thirty sjconds, and each oviparous female deiwsit? 

 nlx)ut six eggs wliicli deL^^ieu intj black as they devel()jx\ 



(Distriubution I 



Japan : Tokyo. 



Anurapliis helichrysi iKalt.i 



Bothriosjxrmv.m itmlluni : many winged and wingless ^•ivip;lrol^3 females 

 were ob.sen-ed on the lower surface of the leaves on J:iuu;uy 26, a.nd NovemVier 

 21), 1921, near- Tiiihoku. 



Eupatoiium formcsanum : the imder surfaces of the leaves are athicked, 

 the infested leaves being rolled. Winged and wingless vivip;U'ous females were 

 observetl ou April 28, 1021, near Tjiilioku. 



Cryptosiphum artemisiae Euckt. 



Aitemiski vidijoris var. iiidica : many winged and wingless vivipirous 

 femnks were observe! on June 26, 1921, on the I\lt. Dniton, nei'.r Ta.ihoku. 



Brachycolus heraculei Takjvh. 



Apihm (jravcolcics : numerous winged ;ind wingless vi\iparous females were 

 ol>ser\ed on Miirch 20, 1921, at Ako, Formos;i. 



Il^yicukum ^ikTtcs : many winged and wingless females in March, A[ ril 

 mid Jmie, lil20 :'.nd 1921. ne.ar Taihoku. 



