ai'Hiwd.t; of forjiosa. 72 



Male : wiuged ; .inteuna;- provided with mauy circular sensoria ; corniclos 

 not reticulated. 



Distribution. — Japan : Tokyo (Megin'o). 



Macrosiphiim rosse (L.) 



(Host pLiLts) 



Eosa sj^p., attacking the young slioot and the bud. 



Some wingless riviparons females of .i,n aphid, which were collected on Eiilvs 

 sp. ou March 23, 19"2i, at Kwaushirei, Formosa, seem to belong to this species. 



(Season when the insect is common) 



Near Taiholui, tliis aphis may lie seen commonly almost at any season, 

 but it rarely occurs in large unml.iers. 



(Winged fi^'iparous female) 



The winged forms are common in Formosa, as in Japan. 



(Male and o%-iparous female) 



It is viviparous all the year in Farmosa, as well as near Tokjo, tiie 

 sexuides having never been observed. The author has observed in Hokkaido 

 a female producing j'oung ou a Rosa that was covered with sno^\-. 



(Intermediate) 



I have never found auj' intermediates. 



(Communal life) 



Not attended hy ants. 



(Distribution) 



Formosa : Taihoku, Kagi. 



Japan : Tokyo, Sapporo, etc. 



Macrosiphiun cirsicola Takah. 



(Host plant) 



Oirs'mm jcqxmicuh} : tlie stems are attacked. The young uumphs sjme- 

 times feed ou the flowers. 



(Observations near Taihoku) 



This aphis is very rar(> and does not occur iu large numbers. The 



