ON THE GALLS OF TEREBINTHUS AND PISTACIA. 
35 
the middle, and tapering to a point at each extremity. It is 
generally folded back upon itself, near the peduncle, and 
often bent in the contrary direction, near the opposite points, 
so that the gall is bistorte (twice bent. ) I possess one speci- 
men entire, 7 centimetres long, by 17 millimetres broad, and 
several large specimens not entire, from 30 to 35 millimetres 
broad, the length of which might have been from 16 to 18 
centimetres. This gall has a decided red color, especially 
externally, it is pretty regularly striated longitudinally, 
smooth, only a millimetre thick, and empty internally, ex- 
cept a small quantity of the exuviae of insects. The sub- 
stance of the gall is compact, rather translucid, mixed with 
white woody fibres, which reach from one extremity to the 
other. It is loaded with a resinous juice, which exudes in 
places outside or inside. It has a very astringent taste, 
slightly aromatic, similar to Chio turpentine, and this char- 
acter is so manifest, that it is sufficient to prove that the gall 
in question belongs to the genus Terebinthus. Lastly, it 
must be observed, that this gall, being formed by a puncture 
on a terminal bud, is always simple and terminated by a 
single point. 
2d sort : Horn-shaped Gall of the ristacia. — This gall 
appears to me to be represented in the Adversaria of Lobel, 
page 412. It is from 4 to 6 centimetres in length, from 8 
to 15 millimetres in breadth, more or less bent, and termi- 
nated by a sharp point. It is tortuous in its length : it is 
covered with a dark grey epidermis, and has sometimes on 
its surface small flat and circular glands, from wdiich a yellow 
resin exudes. The substance of the gall is quite black, light, 
fragile, and from \ to \ a millimetre thick. The taste is 
simply mucilaginous with an aromatic flavor. This gall is 
entirely without astringency. 
3d sort. Cauliflower-gall. — Before receiving the speci- 
men from M. Ledanois, I possessed an entire gall and a frag- 
ment of this sort, which must result from the monstrous de- 
