130 W. H. ASHMEAB. 



Div. II. — Galls on the branches, twigs and blossoms. 

 A. — Galls of a different substance than the limb and which can be 

 taken off without carrying a jDortion of the limb wnth 

 them. 

 a. — Globular galls, with a kernel in the centre kept in position 

 by a softer substance, spongy, fibrous or succulent ; 

 or by filaments radiating from it to the cell ; all 

 monothalmous. 

 t- — Kernel kept in position by a dry, spongy substance . Am- 



phibolips cinerea Ashm. (Q. cinerea). 

 tf. — Kernel kept in position by delicate radiating filaments. 

 Attenuated and pointed at tip . Amphibolij)s citriformis 



Ashm. (Q. laurifolia). 

 Rounded, not pointed at tip . Amphibolips melanocera 

 Ashm. (Q. aquatica). 

 ftf- — Kernel surrounded by a hard cellular or woody sub- 

 stance ; sometimes but slightly imbedded in the sur- 

 rounding substance. 

 a. — Monothalmous . Holcaspis mamma Walsh ( Q. 



macrocarpa) ; A. fidiginosa Ashm. (Q. laurifolia) ; 

 Andricus cinerosus Bass. (Q. virens") ; CalUrhytis 

 agrifolice Bass. (Q. agrifolia) ; Cynips f juglans O. S. 

 (Q. prinus) ; Holcaspis globidus Fitch (Q. alba) ; H. 

 omnivora Ashm. (Q. obtusiloba, Q. ])arvifolia) ; H. 

 rugosa Bass. (Q. prinoides, Q. prinus, Q bicolor). 

 aa. — Polythalamous ; galls very large, cellular structure . 

 Andricus pomiformis Bass. (Q. agrifolia). 

 Hard, woody structure . Callirhjtis Snttoni Bass. 

 (oak unknown), 

 ft ft. —Kernel surrounded by juicy substance ; gall issuing 

 from the side of an acorn . Amphibolips prwuis 



Walsh (Q. ). 



b. — Bud galls ; galls issuing generally from a bud axil, hidden 

 and enclosed in a bud, or surrounded by bud scales, 

 or deformed lanceolate leaflets. 

 t. — Hard, conical galls ; the tips sometimes curved. 



Occurring separately or singly . Andricus coniferus 



Ashm. (Q. laurifolia). 

 Occurring several together, often coalescing . Andricus 

 ventricoms Bass. (Q. ilicifolia). 



