BRITISH GALLS 
162 
Hymen- 
optera 
> ) 
M 
Syn. Andricus globuli Hartig ; Aphilothrix globuli 
Adler. 
Connold, Oak Galls, pi. 23; Plant Galls, fig. 187. 
Houard, No. 1277. Adler and Straton, Alternating 
Generations, pi. r, fig. 8. 
Slight swelling, 1 to 5 mm. long, on the bark of a twig, 
due to the presence in the woody tissue beneath the bark 
of a small, ovoid, white gall, 1 to 3 mm. long. These galls 
are usually gregarious, and then cause pronounced 
irregular elongated swellings on the branch, which is 
sometimes completely distorted and atrophied. The 
swellings also occur on petiole and midrib. Imago, 
August or September, I., II. 
Andricus trilineatus Hartig 228 
Syn. Andricus noduli Hartig. 228^ 
Connold, Oak Galls, pi. 12 ; Plant Galls, fig. 171. 
Houard, No. 1294. Adler and Straton, Alternating 
Generations, pi. 1, fig. 5*7. 
Gall many-celled, situated on exposed roots or at the 
base of the trunk just above the earth ; nodular, white or 
tinted with rose at firs', rounded, attaining the size of a 
small apple, and somewhat fleshy. After the second 
spring it becomes very hard, woody, and dark brown. 
Imago, spring, III. 
Andricus trilineatus form radicis 229 
Syn. Andricus radicis Fabr.; Aphilothrix radicis Fabr. 
Connold, Oak Galls, pi. 26 ; Plant Galls, figs. 163, 164. 
Houard, No. 1290. Adler and Straton, Alternating 
Generations, pi. 1, fig. 5. 
On the male catkin, an ovoid, sharply pointed little 
gall, not exceeding 5 mm. in height, green at first, be¬ 
coming brownish. Sometimes sparsely hairy at the apex. 
Gregarious. Rarely more than two clusters on a catkin. 
Imago, June, I. 
Andricus nudus Adler 230 
Connold, Oak Galls, pi. 13 ; Plant Galls, fig. 222. 
Houard, No. 1191. Adler and Straton, Alternating 
Generations, pi. 2, fig. 12 a. 
In an axillary bud, solitary. Gall subsessile, fusiform, 
about the size of a grain of barley, green, with five or six 
longitudinal striae, often tinted bright red and converging 
to the blunt but slender pointed apex. It falls to the 
ground in September. Imago, spring, III. 
Andricus nudus, form malpighii 231 
Syn. Andricus malpighii Adler; Aphilothrix malpighii 
Adler. 
