80 R. Takahashi. 



Host. — Acer sp. 



Distribution ■ — Formosa (Sozan) 



Many winged and wingless females were collected by tlic autlierin 

 Feburary 1921, when no dimorphs were discovered. But in June 

 1921 only the dimorphs margined witli lamellae were collected. 



Tribe Lachn'ma. 

 Key to suljtribes. 



(1) Body elongate (2) 



Body not elongate (4) 



(2) ]\rales without rostrum '^nhtribe Stomaphidhu- 



Males with well developed rostrum. ( o )■ 



(3) Cornicles on hairy cones Subtribe yippolachnini. 



Cornicles not on hairy cones Subtribe Eulachnini. 



(4) Eyes of the wingless female very small or rudimentary 



Subtribe ^4 ??oec/n/. 



Eyes of tlie wingless female large Subtribe ZacAm'm. 



Subtribf Stomaphidini 



Body elongate. Eyes of the winged female large, with ocular 

 tubercles: but tho.'^e of the wingless female very small. Bustrum of 

 the female much longer than the body, Init that of the male rudi- 

 mentary. Cornicles situated on hairy cones. Tlie 3rd oblique once 

 or twice forked. Males always wingless. The 9th abdominal segment 

 with a small lateral tubercle. 



From Japan tliree species of this subtribe, Stomaphls quercus, L., 

 S. yanonis Tak., and S- pint Tak. liave been recorded, luit in Formosa 

 no species has been found. 



Subtribe Nippolachnini new. 



Tills subtribe is closely related to Anoecini, but differs from it as 

 follows : 



