APHIDID,!: OF FORilOSA. g.j 



(Saisou wlien tlie insect is abnudaut) 



Tlie siX'cies is ratber coramou fruia January to April, Init is rare in other 

 mouths. 



(Winged viviparous female) 



The wiuged fcjrms are very comiuou. 



(Male aud oviparous female) 



This species is cijutinuously vivipari3U3 tliroughoat t!ie 3"ear, without 

 producing the sexual forms, uear Taihoku. 



(Intermetliate) 



No iutermediates ha^e leeu oLserveil. 



(Commimal life) 



This aphis aud Macrosiplium ddnlis Takah. or JI. Joriiiomniuii Takah- 

 are sometimes found in groups ou LridHca or on Suiichm. Not attended ]jy 

 ants. 



(Habit) 



This aphis has the halut, when disturljed, Oi dropping to the groimd. 



(Distribution) 



Formosa : Taihoku, Kwaunouzau near Taihoku. 



Amphorophora sonchifoliae Takah. 



Host plant. — Soncltus arveitsis. 



Some wingless and winged viviparous females were observed ou the stalks 

 aud the under surface of the leaves on March 23, 1921, at Kwanshirei, Formosa. 



Ampiiorophora specie?. 



Host plant.— Pr3///(i japordca, attacking the under surfi\co of the leaves. 

 Some wingless viviparous females and nymphs of winged forms were 

 observed -on July 31, 1921, at Riningau, near Urai, Fonnosa. 



Amphorophora formosana Takah. 



Host plant. — uukuown. 



Some' wingless vi\iparijus females were collected on March 19, Iv'^l, at 

 Kagi, Formosa. 



