:us 



[May 



25. Q. rubra ? C. ccelebs 0. S. 



26. Q. ilicifolia: C. q. ilicifoliae Bassett. 



Group of white and chestnut-oaks. | Group of red, black and willow-oaks. 



stance, hollow inside, but without distinct kernel of a harder sub- 

 stance ; the hollow space usually divided in two or more cells. 



57. Q. alba; gall-fly unknown (the 44. Q. palustris; gall-fly unknown. 



same as the following ?) Syn. 

 of the gall Q. pisum Fitch ? 

 12. Q. alba? C. pezomachoides 0. S. 



58. Q. alba; gall-fly unknown; gall 



Q. erinacei Walsh. 



3. Spindle-shaped galls. 

 8. Q. alba; C. fusiformis 0. S. 



56. Q. prinoides: gall-fly doubtful. 

 {Figites chinquapin Fitch.) 



4. Woolly or hairy excrescences on leaves, wartlike or irregular. 

 11. Q. alba? C. flocci Walsh. 48. Q. palustris: gall-fly unknown. 



45. Q. alba; gall-fly unknown; (C. 



flocci?) Synon.oi gall: Q. lance 

 Fitch. 



46. Q. obtusiloba: gall-fly unknown. 

 21. Q. obtusiloba; C. verrucarum <">. S. 



47. C^. prinus ; gall-fly unknown. 

 47. Q. alba: gall-fly unknown. 



5. Clusters of small galls growing on the underside of the leaves, 

 or on the petiole. 



49. Q. obtusiloba; gall-fly unknown. 51. Q. rubra: gall-fly unknown; gall Q. 



decidua Bassett. 



50. Q. alba : gall-fly unknown. 



6. Tubular galls with spines on the outside. 

 4. Q. obtusiloba; C. tubicola 0. S. 



AA. Galls intimately connected with the substance of the leaf, so 

 that they cannot be taken off without carrying a portion of the leaf 

 with them. 



1. Globular , hollow, monothalamous galls. 



a. With a kernel in the centre, kejut in 

 position by filaments, radiating from it 

 to the shell (same type of structure as 

 the galls of section A, 1, b.) 



27. Q. rubra; C. singularis Bassett. Syn. 



of gall Q. nubilipenni.s Fitch (non 

 Harris.) 



28. Q. ilicifolia; C. Osten Sackenii Bas- 



sett. 

 28. Q. coceinea ; gall-fly unknown. 



b. With a white, cocoon-like body, roll- 

 ing freely about in the cavity (on very 

 young leaves and on buds, early in the 

 spring). 



