nd 2 ' in A * a ne ei x 
Pgs ae | yhy FS fa ie a i ri a aie f AP SO at aD se: fy PED ea oe PS a ae see 
. ba 4 | 
234 «Structural and Physiological Botany. re 
strobilina in the leaf-buds, which causes arrest of growth, — 
‘the stem scarcely developing, and the leaves becoming ~~ 
); fthe 
ed); e-h 
, show:ng a larvain the chamber 
fecundatrix; a oak- 
he same (magnifi 
UU: 
e the insect (natural size 
i; 
-wasp, Cynips 
—— 
—-| 
“lh 
(natural size) ; dt 
a-d the oak-apple 
-gall ; Athe same cut open 
ll wasp, Cynztps scutellarts ; 
in the centre (natural size). 
\ 
e¢ cocoon cut open 
EG 
cZzgA 
the common oak-ga 
same (magnified) ; ¢ oak 
Fic. 379.—Galls and gaJl-wasps: 
apple ; 6 cocoon; 
— in 
crowded together into a close rosette. The rose-gall is eae 
caused by Ahodztes Rose laying its eggs in the branch, the ~ ae 
stem then swelling up to a considerable size from the exu- 
