I70 BRITISH GALLS 



bears at its apex a red and sticky papilla. Imago, March 



or April, II. Rare in liritain. 



Andricus lucidus Hartig 261 

 Syn. Aphilothrix lucida Mayr. 262 



Connold, Oak Galls, pi. 5; Plant Galls, fig. 180. 



Houard, Nos. 1172, 1226. 



Hymen- In a terminal bud. Gall fusiform, about 10 mm. long, 

 optera brown, covered with a felt of hairs of the same colour ; its 

 walls are woody and but slightly thickened. Ihe hairs 

 fall off when the gall arrives at maturity. Imago, Sep- 

 tember, I. 



Andricus solitarius Fonsc. 263 

 Connold, Oak Galls, pi. 15 ; Plant Galls, fig. 181. 

 Houard, No. 1255. 



{b) Agamous Generation only 



, On the under surface of a leaf. Scattered. Gall hard, 



rounded, 2 to 3 mm. long, flattened at the poles ; its larger 

 axis is parallel to the midrib (or rarely a lateral vein), on 

 which it is situated between two little valves, the remains 

 of the membrane which enveloped the growth at an early 

 stage. Green at first, then yellow, with red spots. Imago, 

 October, I. Alternate generation oi Neuroterus Aprilinus 

 (?). (Plates 1., II., IV.) 



Andricus ostreus Giraud 264 

 Connold, Oak Galls, pi. 50; Plant Galls, fig. 213. 

 Houard, No. 1326. Adler and Straton, Alternating 

 Generations, pi. 2, fig. 19. 



. In an axillary bud. Gall solitary, elongated, subcylin- 



drical, acorn-shaped, 4 to 5 mm. long, usually with a little 

 recurved point at the apex, glabrous, entirely smooth, 

 green with whitish bands, giving it a furrowed appearance 

 longitudinally. Falls in May. Imago, spring, II., III. ; or 

 November, I. 



Andricus albopunctatus Sch. 265 

 Connold, Oak Galls, pi. 17, and fig. 7. Cameron con- 

 siders this insect to be .^. quadrilineatus attacking buds. 

 Houard, No. 12S4. 



On the margin of a leaf. Solitary. Gall pyriform or 

 fusiform, 3 to 4 mm. high, 2 to 3 mm. in diameter, green, 

 longitudinally marked with red or yellowish -brown stripes. 

 Imago, Spring, II. 



Andricus marginalis Adler 266 



Syn. Aphilothrix marginalis Schl. 



Connold, Oak Galls, pi. 24; Plant Galls, fig. 198. 



