ART. 19. GALLFLIES OF THE FAMILY CYNIPIDAE WELD. 31 



EXPLANATION OF PLATES. 



Figures natural size except where otherwise noted. 



Plate 1. 



Fig. 1. Undescribed Amphiholips gall ou acorns of Quercus texana Buckley. 



2. Galls of Amphibolips prunus Walsh on Q. veltitina. 



3. Galls of Andricus flmhriatus Weld X 5 ou Q. bicolor. 



Plate 2. 



Fig. 4. Galls of Callirhytis miUeri Weld in acorns of Q. californica. 



5. Galls of Callirhytis fructuosa Weld X 5 in acorns of Q. coccinea. 



6. Galls of Callirhytis lapilhila Weld in acorns of Q. bicolor. 



Plate 3. 



Fig. 7. Galls of Callirhytis balanoides Weld in immature acorns of Q. velutiiui 

 in autumn. 



8. Galls of CallirJiytis balanopsis Weld X 5 on immature acorns of Q. 



marilandica in autumn. 



9. Galls of Callirhytis rniUcri Weld in acorns of Q. loisUzenii (the two 



acorns on right) and Q. agrifolia. 



10. Galls of Biorhiza eldoradensis (Beutenmueller) in acorns of Q. wisU- 



senii (below) and Q. agrifolia (above). 



11. Gall of Andricus fimbriatus Weld on cup of Q. bicolor. 



12. Undescribed species in cup of Q. prinus. 



13. Undescribed species in cup of Q. macrocarpa. 



Plate 4. 



Fig. 14. Galls of Callirhytis balanaspis Weld X 5 on immature acorns of Q. 

 marilandica in autumn. 



15. Galls of Callirhytis operator (Osten Sacken) agamic generation on 



Q. rubra. 



16. Gall of Callirhytis carmelensis Weld X 5 on Q. agrifolia. Dried speci- 



men. 



17. Fresh galls of Callirhytis carmelensis Weld X 5 on Q. agrifolia. 



Plate 5, 



Fig. 18. Galls of Callirhytis balanosa Weld on immature acorns of Q. coccinea 

 in spring. 



19. Galls of Callirhytis middletoni Weld X 5. 



20. Undescribed gall in tissue of acorn cup of Q. bicolor. 



