ra ♦ß-:^> m o) 53 a o *. ug 20 1 



Length of body 2.3 m.m. 



„ „ antenna 1.9 m.m. 

 „ ,, forewinfT 3.0 m.m. 

 Host — Fagus sp. 



The stem-mothers are winged, but the viviparous females of the third and 

 the following generations are wingless. 



Brachysiphum japonicum n. sp. 



Wingless viviparous female. 

 Colour characters : purple or pale yellow ; eyes black ; antennae- the 3rd and 4th 

 joints nearly pale brown, the 5th and 6th black ; legs pale brown, the apices of 

 tibiae and the tarsus, black; cornicles fuscous, Cauda pale brown. 

 Morphological characters : oval, with a few short fine hairs, lacking cottony secre- 

 tions ; frontal tubercles wanting; rostrum reaching to the 2nd coxae; antennae 

 nearly hairless, the relative length of the 3rd and the following joints is as 

 follows: (III) 12; (IV) g; (V) 9; (VI) 26 (6 + 20); the 3rd joint wants sensoria ; 

 prothorax, the 3rd, 5th ami 7th abdominal segments with a jsrominent short 

 tubercle on each side; cornicles very short, neaily as long as broad; cauda 

 wedge-shaped ; legs with long fine hairs. 

 Length of body i .0 m.m. 



„ ,, antenna i.i m.m. 

 Host — Eularia japonica. 



The winged form of this aphis is very rare. 



