i62 BRITISH GALLS 



Syn. Andricus globuli Hartig ; Aphilothrix glohuU 

 Adler. 



Connold, Oak Galls, pi. 23; Plant Galls, fij. 187. 

 Houardj No. 1277. Adler and Straton, Alternating 

 Generations, pi. i, fig. 8. 



Hymen- Slight swelling, i to 5 mm. long, on the bark of a twig, 

 optera due to the presence in the woody tissue beneath the bark 

 of a small, ovoid, white gall, i 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. 



Akdricus trilineatus Hartig 228 

 Syn. Andricus noduli Hartig. 228a 



Connold, Oak Galls, pi. 12 ; Plant Galls, fig. 171. 

 Houard, No. 1294. Adler and Straton, Alternating 

 Generations, pi. i, fig. ja. 



,, 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 firsf, 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 Tabr.; Aphilothrix radicisYAix. 



Connold, Oak Galls, pi. 26 ; Plant Galls, figs. 163, 164, 

 Houard, No. 1290. Adler and Straton, Alternating 

 Generations, pi. i, 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 hairyat 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^:. 



•I 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 ^^^x; Aphilothrix malpighii 

 Adler. 



