jg6 



Index. 



Pleurotropis cyniphidium, 8i. 

 Pliny on galls, x. 

 Polar cells, xx. 



fertilization of, xxvii, xxx. 



function of, xxiv. 



of parthenogenetic egg, xx, 

 xxix. 



of sexual eggs, xxix. 



retained, xxxi. 

 Polyspermy, xxx. 

 Porizon claviventris, 63. 

 Primitive germ-cell, xxi, xxii. 



sperm-cell, xxi, xxii. 

 Protective characters, xxxiii, 104. 

 Psocus subocellatus, 77. 

 Pteromalus bisignatus, 85. 



cordairii, 47, 79. 



decidens, 78. 



dilectus, 77- 



dubius, 78. 



Dufourii, 79. 



fasciculatus, 63. 



fasciiventris, 77. 



fuscipennis, 77. 



gallicus, 79. 



hilaris, 77. 



iucrassatus, 69. 



jucundus, 47, 63. 



leucopezus, 79. 



meconatus, 47, 79. 



naubolus, 77. 



ovatus, 77. 



planus, 78. 



platynotus, 78. 



puparum, 151. 



Ratzeburgi, 60. 



Saxescenii, 47, 69, 81. 



semifascia, 77- 



stenonotus, 79. 

 Purple velvet bud gall, The, 64. 



Quercus bicolor, 3. 



pedunculata, 15, 50, 172. 

 pubescens, 15, 172. 

 sessiliflora, 7, 15, 50, 172. 



Radoszkowsky, 9, 143. 

 Ratzeburg, xiii. 

 Reaumur, xii, xxxviii. 

 Receptaculum seminis, 16, 32, 

 142. 



Rectal, papilla, 132. 



glands, 139. 

 Rectum, 132. 



Red barnacle gall, The, 35. 

 Red wart gall, The, 70. 

 Reinhard, xiii, 3. 

 Reproductive rudiment, xxx. 

 Respiratory organ, Eggstalk as, 



124. 

 Rhodites eglanteriae, 143, 152, 



159- 

 rosae, xvii, 143, 152, 159. 



spinosissima, 159. 



Riley, xiii. 



Rolph, 153. 



Romanes, Prof., on galls, xxxii. 



Root gall. The, 73. 



Roots, how pricked, 32. 



Rosechafers, 77. 



Rotifera, 153. 



Salix amygdalina, 99, 150. 



Salpae, xii. 



Sapholytus connatus, 34, 44, 



63- 



Scarlet pea gall. The, 69. 

 Schenck, xiii. 

 Schenck's gall, ■zo. 

 Schlechtendal, xiii. 

 Seta, no. 



Sex, differentiated in egg, 77. 

 Sexes, order of appearance, 16. 

 Sexual reproduction, xviii. 



rudiment, xxv. 

 Siebold, Prof, v., 150. 

 Siphonura brevicauda, 54. 



chalybea, 42. 



viridiana, 47. 

 Spangle gall. The common, 15. 



The cupped, 24. 



The silk-button, 21. 



The smooth, 19. 

 Spathegaster, 9, 130, 146. 



albipes, xxxiii, xxxix, 19,47? 



95. 131. 

 Aprilinus, xxxiii, 85, 86, 95. 

 baccarum, xviii, xxxi, xxxiii, 



xxxix, 5, 13, 15, 17, 24, 



95-100. 

 interruptor, 15. 

 similis, xxxix, 66, 67, 86, 95. 



