132 W. H. ASHMEAD. 



e. — Thin shelled, resembling pressed figs . Blorluza fortl- 

 coniis Walsh (Q. alba). 

 More rounded . Holcaspis ficula Bass. (Q. macrocarpa, 



Q. obtusiloba, Q. parvifolia). 

 Pine-cone shaped . Cynips strohilana O. S. (Q. bicolor). 

 ee. — Thick shelled, hard . Holcaspis ficigera Ashm. (Q. 

 virens). 

 Rounded, not compressing each other . Holcaspis suc- 

 cinipes Ashm. (Q. virens). 

 AA. — Galls comprising swellings of the branches and twigs and 

 which cannot be removed without carrying a portion 

 of the branch or twig with them. 

 f . — Terminal or subterminal swellings of the limb ; either of a 

 hard woody structure or of a soft cellular substance. 

 a. — Monothalamous ; of a hard, Avoody structure . Callir- 

 hytis clavula Bass. 

 Syn. C. arbos Fitch, C. tuber Fitch (Q. alba) ; Neuro- 

 terus phellos 0. S. (Q. phellos) ; C. similis Bass. (Q. 

 ilicifolia) ; C. aquaticic Ashm. (Q. aquatica). 

 aa. — Polythalamous ; of a soft, cellular substance . Neuro- 

 terus batatus Bass. — Syn. Cynips batata Fitch. (Q. 

 alba). 

 If. — Swellings in the middle of the branch ; all polythalamous. 

 b. — Of a soft, cellular structure . Andricus batatoides Ashm. 



(Q. virens) ; Neuroterus noxiosa Bass. (Q. bicolor). 

 bb. — Of a hard, woody structure . Andricus Coxii Bass. 

 (Q. agrifolia) ; A. f floridanus Ashm. (Q. parvifolia) ; 

 Callirhytis j^^mctata Bass. (Q. rubra) ; C. podagrce 

 Walsh (Q. nigra) ; C. scitula Bass. (Q. tinctoria) ; 

 C. calif ornica Bass. (Q. Hindsii) ; Neuroterus Rileyi 

 Bass. (Q. castanea). 

 l,}jl)_ — With spines or fusiform tubes . Callirhytis cornigera 

 O. S. (Q. palustris) ; Andricus clavigerus Ashm. (Q. 

 laui'ifolia). 

 ■\'\'f. — Larval cell hidden under the bark . Andricus cryptus 

 Ashm. (Q. catesbaii) ; Biorhiza nigra Fitch (Q. alba). 

 tttt- — Swellings surrounding the base of new shoots or twigs ; 

 hard, woody structure. 

 d. — Small size . Jindricus cateshei Ashm. (Q. catesboei) ; 

 N. longipennis Ashm. (Q. laurifolia). 



