106 KVuIcm T.VK.VIIASUI : 



luinutes. Tlie cg<^3 .110 yoUowish brown, when uewly producecl, grii'luiill\- 

 davkeniDg to black. The nymphs nnd the wingless forms of the second generu- 

 tiou secrete a p)wdor from the surface of the dorsn. 



(Communal lil'e) 



Aphis smnhuci L. and Arnjihoirqihora 7itagiidiac llssig et Kuw. (syu. 

 lihopalosiphinn sainluckoJn Takah.) are sometimes found t<.>gethir in gr(:)ups on 

 tlie Soinl.ncus racnmosa. 



(Distribution) 



Jap'in : Tnkyo, Sappnro. 



Aphis bambusae I'l'H- 



(Host plants) 



Bainhitsa nana : the lower surfaces of the lea^•es are attacked. 



Bam'vsa slenoslachya : the young shoots ai-e very rar>.h- attuckeil. 



Bamlvsa species : the lowei' surfaces of the leaves m-e attacked. 



(Season when the species is common) 



Isear Taihoku this aphis is rather uncommen, usually- occiuring in \eiy 

 small uumlxjrs, Init the wingless viviparous females were observed in enomorous 

 uuuibers in l•"ebl■^ar^■, 1922. Near Tokyo it may be seen eonnuonly on the 

 Bamhusa from the fu'st ^^eek of June to the licgiuuiug of Novomlxn-, occasionally 

 occurring in ;d)undance, the gi'eatest numbers apparently l)eing ft)und at the 

 lieginning of .\ugust. 



(Winged \i\ip:ir(jus female) 



Kear Taihoku the winged forms seem to be quite rare, only one lia^•ing 

 l)een ol)3erved on January- 22, 192?. Near Ti^ikyo, they are rather uncommon, 

 but many -^ere ol)served at the last of June and fi-om the midille of Octobm' 

 to the first week of Novenilx3r. 



(Male and oviparous female) 



Tlie sexuales have never lieeu found in Formosa nor in Japiu. Neiu' 

 Tiulioku it is probably viviparous throughout the ye;u', n<it producing any 

 sexuiil forms. 



(Intermediate) 



No intermwiiatjs have bjeu imticed. 



