XI. 



Figure 82. Fraggria vesca * Cross-section through a 

 (p. E14) Phytoptus finite) gall. (Original). 



Figure 83. Diagrammatic reproduction of a Cynipides v/all- 

 (p.. 215) ed-gall. (Taschenbergi-gall) a,, early 



stage, Id- d various later stages of the 

 circumvallation. f After Beyerinck)-^ 



Figure 84.. Quercus . Production of the many chambered 

 (p. 216) v/alled gall of Cynips terminalis . At 



the left, vegetative cone of the Quercus; 

 the upper part fvp. ok) has been sav/ed 

 off by the mother insect. The eggs have 

 been deposited on the surface of the 

 stump (rt).. At the right, circumvall- 

 ation of the eggs by the outgrowing tis- 

 sue (-gp, "gall-plastem") . A to G- dif- 

 ferent stages of circumvallation. lid 

 nutritive yolk, Ik larval chamber, Fl 

 egg-stalk.. (After Beyerinck) 



Figure 85. Prunus spinosa . Sac-gall with "orifirial wall" 

 (p. 217) A, cross-section through a mite gall, 



( Eriophyes similis ) . B, cross-section 

 through a mite gall of Salix Caprea . 

 (A, Original, B, after Frankj . 



Figure 86. Tteo developmental stages of the gall of 

 (p. 217) Hormonyia fagi . At the left, circumval- 



lation; at the right, sac-formation, a, 

 dividing layer; b, tissue folds. (After 

 Busgen) . 



Figure 87. Young developmental stage of the gall of 

 (p. 218) gormomyia piligera . The dotted lines at 



' th e 1 eft indi cat e the regular arrange- 

 ment in rov;s of the parenchyma cells, 

 The thick-walled tissues a3:'e indicated 

 by shading, a-a ring roll, 1, larval 

 cavity, e, the upper epidermis of the 

 leaf. (Original) 



Figure 88. Salix. One-chambered "enclosed" medullary 

 (p. 220) gall of Hematus Vallisnerii. L, larval 



cavity. "!J?he inner tissue 'containing 

 chlorophyll is indicated by a darker 

 shade. (Original) 



Figure 89. Quercus. Cross-section throu^ the "free" med- 

 (p. 220) ullary gall of Biorrhiza aptera on an 



oak branch. (After Beyerinck) . 



Figure 90. Parinaririin obtusifolium . Cross-section through 

 fp, 221) a leaf gall. The epidermis is drawn as a 

 Vieavy line. The thick-walled tissues are 

 represented by shading, the direction in- 

 dicating the arrangement in rows of the 

 Sclerenchymatic elements.!, larval cavity. 



)riginal 



ym, 



JUL 



1. Beob, ub. d. ersten Entwickel. einiger Gynipiden- 



gallen. Akad. Wiss. Amsterdam, 1882, 



