Ariiiijiii.i: OF F( iini( isa. 59 



Japan : Tok^-o, etc. 



Aphis gossypii <il'>v. var. callicarpae Takali. 



(Host plant) 



CaUtrarpa /oriiiosmni : the lower sides of the young shoots rtud tlio leaves 

 ai'e attacked. 



(Season when the insect is commijn) 



Near Taihokn it is common through the year, occumug in lai'gc numbers 

 from abont Febniary to June. 



(Winged vivip.irons female) 



The winged forms are prolmied very commonly at any season. 



(Male and oviparous female) 



It is viviparous even during the winter without ])roduciug sexual 

 forms. 



(Distribution) 



Formosa : Taihoku, Urai, Shiriu, Bolvusaku. 



The author observed some wingless viviparous females, the dorsa of which 

 were covered with white secretions nn Octol.ier 31, 1921, near Taihoku. 



Aphis malvae Koch. 



A. Observations near Tailmku. 



(Host plants) 



Cncuiiils sativus: the under snrfaces nf the leaves ai'e athicked, the infested 

 leaves being curled. This .•-t.phis is one <>f most important pesti of the Gunonis, 

 doing serious damage. It is present on this plant, ner.v Taihoku, from about 

 July to October. 



Clerodcmlron ciiiioplujlhiia .and CliiOtkiidron ^pp. : the lower sides of the 

 leaves are attacked and the infested h;aves are curled. The apliis may bo 

 commonly seen on this plant tln-oughout the year. 



Dunmta pjlniuivrl : the aphis is rarely seen on the young twigs and leaves. 



Prcmna formosana : many viviparou? females were observed on the lo\ver 

 side of the curled leaves on April 4, 1922, at Marnyama, near Taihok. 



