51 



bined, the 3rd joint twice as long as the 4th and provided with 29 

 annulations, the 4th and 5th subequal in length, the former with 14 

 and the latter with 13 annulations, the apex of the 15th smooth and 

 with a few hairs; rostrum dark brown, rather short, and reaching to 

 the first coxae; wings hyaline, veins yellow, the first 2 obliques branching 

 at the base, media at the base obsolete, the furcal nearly in par ailed 

 to the stigmatic nervure and widely separated from each other, stigma 

 grayish green; hooklets on the hind wings 2; legs fuscous brown. 

 Length of body 2.34 mm. ; exp. tegm. 3.79mm. ; antennae 0.8 mm. 



Apterous viviparous female - Body oval, light orange yellow, sparsely 

 covered with mealy secretions; head hemispherical; antennae 5 jointed, 

 the first and 2nd joints short and stout, the 3rd the longest, the 4th 

 and 5th subequal, each nearly one half as long as the 3rd, the 5th at 

 the middle with a notch (rhinarium), and on its apex with a small 

 bristle; rostrum reaching beyond the 3rd coxae; legs stout, the hind 

 oik's being longest. 



Length of body 1.14 mm.; breadth 0.72 mm.; antennae 0.2 mm. 



According to Prof. C. Sasaki formation of the galls is as follow: 

 "If we examine the trees of Styrax japonicus towards the middle of 

 May, many of the terminal buds of their branches or branchlets may 

 be found to have grown larger than the normal ones, and be composed 

 of some number of smaller deformed leaves when looked at from the 

 outaides. These are really the beginning of the formation of galls. In 

 each of these galls is generally imprisoned a single larva of diminutive 

 size- This is the larva which makes its way into the bud and initiates 

 the formation' of galls. As the buds grow larger and more swollen, the 

 modified leaves increase in number and size, and assume the shape of 

 either horn-like processes or partly expanded leave3. Within the gall 



