44 



K. Takahashi. 



(3) Wingless viviparous females slightly covered witlia pulvelrence( 4 ) 

 Wingless viviparous t'emalo not covered witli a pulvelrence ...( 7 ) 



(4) Frontal tubercles absent, on the inner side not convex 



A. Icurosawai \\. sp. 



Frontal tubercles very short, on the inner side somewhat convex. 



(^) 



(5) Spur very long and slender, about 4 or more times as long as the 



l.iase A. bambusae Full. 



Spur not so long. ( <> ) 



(0) Cornicles as long as the cauda. Si)ur almost as long as the ord 



jt)int A. droserae u. sp. 



I'oriiicles a little shorter tlian the cauda. Spur longer than the 

 ;'>i<l joint A.nastnrti I K.OCh '? 



(7) Winged females with 8-15 sensoria on the 3rd antennal joint. ( 8 ) 

 Winged females wiih 4-() sensoritvon the 3rd antennal joint. (10) 



(8) i)ody elongate; dark green A. ma idis Fitch. 



Body not elongate; dark gretn, I'rownish or purple ( '•' ) 



(9) Bo'ly and antennae with rather long hairs. A. somei Ess et Kuw. 

 Btidy and antennae almost lacking long hairs. A. formosanus n..sp. 



(10) Yellow. Feeding on ilfffastomw A. >^hirakii w. ^]}. 



PurpHsh or dirty yellow. Feeding on Miscanthiii^ 



A. miscunt/ii n. sp. 



(1 1) Wingless females densely covered with a white powder 



A. smilcKifoliae n. sp. 



Wingless females not covered with a white powder (12) 



(12) Winged females willi n-\0 sensoria on the 3rd antennal joint. (14) 

 Winged females with l-")- 18 sensoria on the 3rd antennal joint. (13) 



(13) Spur of tlie last antennal joint longer than the 3rd 



... A. tavalesl DelQuQr 



Spur a- long as the 3rd A. nimicisL. 



(14) The :'>rd antennal joint of the wingless vidiparous female longer 



