142 llYdlClU TAKAUASHI: 



cltiilcs iiiil>- the wiupcnl, tlio uilnlts of winch owniv on the EiiohcArija from the 

 luiildlo uf !\I;ij to the boj^iuniiig of Juue, thou inigi-atiug t ) th J summer h )st. 

 Tlie sexnp;irai luako tlieu- !ip|X3!iriUK'e from about the 20th clay of September 

 tj the begiuning of Octjlxjr. Eai^h oviparous female deposits about 10 eggs 

 upon the lower side of the heaves these being ]iale yellowish in cjlour, with 

 one end pale l)rownish, when newly deposited, gradually dirkeuiiig t«i a ilcep 

 green, and before hatching botli ends changing into blackish. 



(Habit) 



Tlu^ aphis has the habit, wliLna slightly disturljed, of dropping to the 

 ground. 



(Disti-ibutiou) 



Japan : Tokyo, etc. 



Aiceona actinodaphnii Takah. 



Host plant. — Adhiodaplcm pedlcdlala : the lo\v(-r snrfice of the leaves and 

 tlie young twigs are attacked. 



Many ^vinged and \\ingl(!SS ^•iviparous females were observed cm January 

 ?>, li)21, at Urai, near Tailiokn, and a few wingless individuals on M-ircli 2:5, 

 1!>2I, at Kwanshirei, Formosa. 



Oregma bambusicola Takah. 

 (PI. Yin, 11, iig. i:; \ I'l. IX, B) 



(Host plants) 



BamhiiSd denostaclnja, Bamhusa nana, Bamhusa sp. : the tender stalks 

 and the yoimg shoots are attackwl. The loaves arc not fed upon. 



(Season when the iuscK't is abundant) 



Tliis Orc'jm'i is very common near Talhoku, but is not as camnuu iis 

 Or.'jma lamhmifuliae Takah., occasionally being abundant at auv- ssjisju. 



(Winged viviparous female) 



The winged fonas aj'e exti'cmcly riU'o near Taihoku, where usualh- only 

 tin- wingless viviparous females are seen throughout the year. 



Sjme winged \iviparous females were observed iu one cjlouy on Bitml'ini 



