72 KVOICHI ■I'AK.UI.VSUI: 



;nitlior lias oV)Serve<l n iVsw ^vin^loss iuul wiugod vi\'ipavous feiuiiles only in 

 the montks of February, ^larcli, April, aiitl May. 



(Obson-atious near Tokyo) 



Tills sixjcies is rather rare, asnally oocuiTiiig in siuall numbers, but it may 

 bo seen Iroui June to November. The wiugcl males were observed in the 

 1st week of November, 1919, at IMeguro, Tokyo. 



(lutermediate) 



No intermediatt's liave been observed. 



(Habits) 



nesting on the host, \\ith the ho;id directed downwards. The \iviparous 

 females sometimes secrete a yellow Hnid fi-om the cornicles when dLstnrbed. 



(Commmial life) 



This aphis is almost .-dways foimd in the colonies of Macrosiphum (jdbonis 

 ISIats. Not attended by ants. 



(Distiibution) 



Formosa : Taihok u . 



Japan : Tokyo, 8app»ro. 



Macrosiphum ambrosiae Th )m is. 



ITost plant. — Giiap/fiUnm uriiltireps, attacking the stem. 

 Onh' a f<!W \\'iugless %'iviparous females were observed on March 22, 

 1921, at Ivwanshirei, Formasa. 



Macrosipliuin smilacifoliae Takah. 

 (I'l. T, A, iigs. 3-4) 



Host plant. — Smilctx cldnemis, attacking the under surface of the young leaf. 



Oidy a wingless vivijmrous female was observed on March 12, 1921, but 

 many were found on April 17, 1922. The aphis tkops ta the ground when 

 .slightly distnrlxxl. 



Distribution. — Formosa : Taili oku. 



