94 KYOIt'HI TAK.UIASHI: 



(Male and oviparous female) 



The scxiialos do not make their appearance even iu the winter, which is 

 sjieut, near Taihokn, as \i\ipar.jus females on the leaves. 



(Intermediate) 



No intermcxliates have bam noticed. 



(Hitbit) 



The winirles? for;us gi'oup al )Ug tlie midribs of the leaves, with the heads 

 directed dt)wnwards, and are not attendeil by auti. 



(Distribution) 



Formosa : Tnihoku, KcJieki. 



Cavariella bicaudata Kssii? et Kuw.) 



Host lAMiU—S'dix warburijii ; S'di.c sp, attacking the leaf. 



Tiie winged and wingless viviparous females were observed in large uninl)ers 

 on May, 9, 1920, at IMamyama, near Tailioku, and .m ^h\y, -1, 17, and 2'), 1922, 

 near Taihokn. 



Toxoptera leonuri Takah. 



TTost plant — Lcomirus dllrlvus, attacking the leif. 



IVIany winged and wingtes viviparous females were observed on February 

 12, 1921, near Taih .ku. 



Toxoptera aurantii (Rner) 



(ri. 1, -V, figs. 8—10) 



(H(jst plants). 



A. Observations near Tokj-o. 



Illkkim anisatum : the upper surface of the leaves is att^icked, and the 

 infestt>d loaves are rolled. The aphis is present on this plant fi-om abjut the 

 last uf May t<j the last oi June, the winged forms occm-ring from the middle 

 of June on. It is difficult t j see the aphis on tliis plant in other months. 



Stijm V Juponicuin : the under surfaces of the young l('a\e3 are attacked 

 and the infected leaves are somewhat curled. This aphis may be found on 

 tljis plant from July to August, but usually iu small numbers. The authjr 



