i64 BRITISH GALLS 



Hjrmen- Slight fusiform swelling, about 2 to 3 mm. long, on the 

 optera petiole or the midrib, glabrous, green. This gall much re- 

 sembles those cAAndricus trilineatus Hartig (see No. 228), 

 which occur in similar situations, and the imagines are so 

 much alike that, according to Adler, they cannot be dis- 

 tinguished with certainty. Imago, August or September, I. 



Andricus testaceipes Hartig 236 

 Connold, Oak Galls, pi. 16 ; Plant Galls, figs. 196, 197. 

 Hoiiard, No. 1318. Adler and Straton, Alternating 

 Generations, pi. i, fig. ta, 



I, At the base of very young oaks and on twigs and 



branches which touch the ground. Galls gregarious, 

 appearing as little red excrescences in longitudinal chinks 

 in the bark, each assuming later the shape of an obtuse 

 cone. The outer covering dries up at maturity and falls 

 away, leaving a conical hard gall 5 to 6 mm. high and 

 4 to 5 mm. in diameter, marked with longitudinal striae 

 extending from the base to the summit. Imago, March, III. 



Andricus testaceipes, form Sieboldi 237 



Syn. Andricus Sieboldi Hartig ; Aphilothrix Sieboldi 

 Hartig. 



Connold, Oak Galls, pis. 27-30 ; Plant Galls, fig. 172. 

 Houard, No. 1293. Adler and Straton, Alternating 

 Generations, pi. 1, fig. 6. 



,, Gall developed from a terminal bud, rounded, fleshy, 



smooth, yellowish tinted with reddish-brown, varying in 

 size from that of a walnut to a small apple. In section 

 showing numerous ovoid larval cavities, with the longer 

 axis parallel to the branch which bears the gall. Imago, 

 June or July, I. (Plate IV. i.) 



BlORRHIZA PALLIDA Oliv. 238 

 Syn. Teras terminalis Fab. ; Biorrkiza terminalis Cam. 

 Connold, Oak Galls, pis. 56, 57 ; Plant Galls, fig. 174. 



Houard, No. 1262. Adler and Straton, Alternating 



Generations, pi. 2, fig. it a. 



,, On the subterranean roots, sometimes at a depth of 



3 feet. Galls at first brownish-yellow, or reddish in parts ; 

 they occur on roots of all sizes ; the surface is warty and 

 substance fleshy. At maturity the gall is blackish-brown, of 

 a woody consistency, and about the size of a pea or a cherry, 

 and contains one or many larval cells. Often gregarious, 

 sometimes welded together into a large mass. (Plate IV. 5.) 



BlORRHIZA PALLIDA, form APTERA 239 



Syn. Biorrhiza aptera Bosc ; Biorrkiza terminalis Cam. 



Connold, Oak Galls, pis. 31-34; Plant Galls, fig. 165. 

 Houard, No. 1289. Adler and Straton, Alternating 

 Generations, pi. 2, fig. 17, 



