APHI1IID33 OF FOKJinSA. 93 



Triticum nihjarc, etc. : near Tokyo the riphis sometimes occurs in large 

 numbers, liut iu Formosa I have never ol)servecl it on these plants. 



The wing-venatioD of Yamatapliis described or figured by Matsumura 

 and Baker is not normal, since the 3rd oblique of wliich is usually twice forked 

 like that of many other Axjhidiuse. 



This species is quite rare near Taihoku and seems to he continuously 

 viviparous throughout the year iu Formosa. 



Distribution. — Formosa : Shinchiku, Kagi, Toyohara. 



Japan : Tokyo, Sapporo, etc. 



Cavariella araliae Takah. 



(Host plant) 



Aralia spinosa : the under surfaces of the tender leaves are attacked. 



(Season when the insect is abiuidant) 



The gi-eatest abundance seems to occur from January to March, but its 

 numbei-s are reduced at other seasons. 



(Winged viviparous feu;ale) 



The winged viviparous females are very rare, only one specimen having 

 been collected on March 23, 1921, at Kwaushirei, Formosa. 



(Mlae and ovipirous female) 



The sexual forms have never been observed. 



(Distribution) 



Formosa : Taihoku, Urai, Kwauuouzan, K^van3hirei. 



Cavariella neocaprae Takah. 



(Host plant) 



Sdix u-arhurgii : the lower surface of the young leaves, along the midribs, 

 and the tender shoots are attacked. 



(Season ^\heu the species is common) 



Near Taili.jku this species may bo found rather commonly, but usually 

 in small uumbei-s, iu February and INIarch, and Is rarely seen in other mouths. 



(Winged viviparous female) 



The winged forms have been observed in February and March. 



