1G8 



INDEX. 



of growth, 2 ; colours of, xiii ; 

 dissimilarity of shapes of, 12 ; 

 duration of growth, 10 ; early 

 development, 3 ; modifications 

 in, 16; numerical aspect of, 

 20; positions occupied by, 11 ; 

 preservation of, 44 ; rapid 

 growth of, 10 ; resemblance to 

 Continental forms, 12; simi- 

 larity of growth of, 11; slow 

 growth of, 10 ; smell of, 18 ; 

 taste of, 18 ; variations — in 

 colour, 15 ; in shape, xiii ; in 

 size, 14; in textu.re, 15 



Oak leaves, colovirs of, 38 

 „ tree, flowers of, 37 ; leaves of, 



37 ; primary root of, 35 

 „ wood, annular rings of, 37 ; 

 properties of, 36 



Ojjcgrajjh quercina, 148 



Parasites, 150-152 

 Phloem, The, 1 

 Piioma gallorum, 107 

 Pit-making oak coccid, 146 

 Plagiotrochus llicis, 145 

 Planchonia fimhriata, 146 

 „ quercicola, 146 



Principles of oak gall formation. 

 The, 1 



Qucn-us cerris, 38 ; bitterness of 

 acorns of, 39 ; scales on 

 cvipule of, 38 

 Ilex, 39, 144 ; colour of 

 wood of, 39; rapid growth 

 of, 39 

 „ pedunculata, 34 ; observa- 

 tions on growth of, 36 

 „ puhescens, 144 



rolur, 33 ; the type of oaks, 

 33 

 „ intermedia, 34 

 „ jjedunculata, 34 

 „ sessilijlora, 34 

 „ sessiliflora, 34 

 terminalis, 102 



Saphylotus connatus, 126 

 Sexual generations, 49 

 Simplest forms of galls, 5 

 Some features of oak gall growth, 9 

 Spathegaster albipes, 118, 119, 126; 

 coinciding with some 

 Andricus species, 126 

 „ Apinliniis, 124, 1 27 ; 



unequal rapidity of 

 growth of, 128 

 „ haccarum, 120, 129 ; 



appropriateness of 

 name of, 130 ; extra- 

 ordinary abundance 

 of, 130 

 flosculi, 132 

 Giraudi, 132 

 interruptor, 120, 129 

 punctatus, 125 

 similis, 114, 131 ; Adler 

 on, 131 ; rax'ity of, 

 131 

 „ Taschenbergi, 116, 132 ; 



beauty of, 132 

 „ tricolor, 117, 133 ; acid 



flavour of, 133 

 „ varioxis, 117, 120, 133 



„ verrucosa, 134 



„ verrucosus, 112, 134 ; 



Adler on, 134 ; galls 

 of, 135 

 „ vesicatrix, 122, 122, 135 ; 



gall similar to, 137 ; 

 radii on surface of, 

 136 

 Southwell, Thomas, F.Z.S., xv 

 Steenstrup, J. J. S., on alternate 



generations, 31 

 Straton, C. E., M.D., translation by, 



xviii 

 Swanton, E. W., observations on red- 

 currant gall, 24 ; of Neuroterus 

 numismatis, 123 ; on abundance 

 of galls, 24 

 Synergus facialis in ten galls, xiv 

 ,, vulgaris in nine galls, xiv 



