74 KVOICllI TAKAU^VSIII : 



Macroaiphum granarium Kirby. 



(Host pliiiits) 



In Formosa tliis ajiliis luis been fouiiil on Miscduthus sp. and Oryxa 

 saliva ? 



Near Tokyo it was obsen-al on llordaun salivum, Trilicum vuhjrirc and 

 soiuo plai.ts of tlio (iraiiiinoir;. 



(Sciiisoii wb n the apliis is abundant) 



Near Taiholai tliis insect is oxtremoh' rare at any se.tson, but no;ir Tokyo 

 it occurs in gieat abundance fi-om the beginning of ]\Iay to the end of July 

 and is extremely rare in other months. 



(Winged vi\iparous female) 



Very conimon near Tokyo. 



(Male and oviparous female) 



TLo author li;is never obserAed the sexual forms. 



(Colour \ariatiou) 



Kear Tokyo many reddish brown individuals may be foimd fi-om ]\Iay to 

 July. 



(Distribution) 



Japan : Tokyo, Sapporo, etc. 



Formosa : Taihoku. 



Macrosiphiun formosanum Takah. 



(Host plants) 



Laduca hrcvlroslris, L. dchilis, L. fonnosana, L. scarida, L. gracilis, 

 Smams deraccus : the stalks and the lower stn-faces of the leaves, chiefly along 

 the midribs, are attacked. 



Tararaann plati/earpum : some wingless vi\iporous females wore obser\ed 

 on April :J0, 1922, at Tansui, Formosa. 



(Season when tlie insect is common) 



Near 'J'aihokii tjiis species is (juite common all the year, occasionally 

 occumng in abundance. 



(Winged viviparous female) 



'Hw winged forms are very coimuon, api^aring in almost every vixiparous 



