At'EIDID-E OF FOTiMOSA. 77 



(Male aDcl o\-iparoiis female) 



This species is probably viviparous all the year, without proiluciiig the 

 sexuales, as iu most Aphidid;v iu Formosa. 

 (Distiibution) 

 Formosa: Taihokii, Urai, Kapjmuzaii. 



Macrosiphoniella sanborni (CTilktte). 



Host plants. — Chrijsanfhcmum spp. 



Tliis aphis seems to be rather rare in Formosa, since 1 have obseiTcd 

 some wingles? viviparous females only on April 19 and Julj- 6, 1920, and ou 

 February 14, 1921, near Taihoku. 



Macrosiphoniella formosartemisiae Takah. 

 (PI. n, A, flgs. 1—3). 



(Host plant) 



Artemisia aqnUariv : the stalks are attacked. 



(Season when the species is common) 



The viviparous females are very commou on this plant, throughout the 

 year, occasioually occuning in large numbers at any season. 



(Winged viviparous female) 



The winged forms are produced uot uncommonly at any season. 



(Male and oviparous female) 



This aphis is continuously viviparous through the year near Taihok, and 

 no sexes have been found. 



(Intermediate) 



No intermediates have beeu observed. 



(Habit) 



The females direct the heads downwards when at rest and drop to the 

 graund when disturbed. 



(C'ommual life) 



The species and Macroiiphv.m neocuiemisiae Takah. are sometimes found 

 together in groups on the Aiiemisia capillaris. 



(Distribution) 



Formosa ; T;iilioku, Kagi, Giran. 



