168 
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 texture, 15 
Oak leaves, colours of, 38 
» tree, flowers of, 37; leaves of, 
87; primary root of, 35 
» wood, annular rings of, 37; 
properties of, 36 
Opegraph quercina, 148 
Parasites, 150-152 
Phloém, The, 1 
Phoma gallorwm, 107 
Pit-making oak coccid, 146 
Plagiotrochus Llicis, 145 
Planchonia fimbriata, 146 
- quercicola, 146 
Principles of oak gall formation, 
The, 1 
Quereus cerris, 88; bitterness of 
acorns of, 39; scales on 
cupule of, 38 
5 Ilex, 39, 144; colour of 
wood of, 39; rapid growth 
of, 89 
pedunculata, 84; observa- 
tions on growth of, 36 
*3 pubescens, 144 
3 robur, 33; the type of oaks, 
33 
intermedia, 34 
pedunculata, 34 
55 »  sessiliflora, 34 
5 sessiliflora, 34 
55 terminalis, 102 
oe 2 
2 ” 
INDEX. 
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 
‘Aprilinus, 124, 127; 
unequal rapidity of 
growth of, 128 
ee baccarum, 120, 129; 
appropriateness of 
name of, 180; extra- 
ordinary abundance 
of, 180 
rr floseuli, 132 
3 Giraudi, 132 
Pr interruptor, 120, 129 
5 punctatus, 125 
3 similis, 114,131; Adler 
on, 131; rarity of, 
131 
5 Taschenbergi, 116, 132; 
beauty of, 132 
5 tricolor, 117, 133; acid 
flavour of, 133 
55 various, 117, 120, 133 
i verrucosa, 134 
- verrucosus, 112, 134; 
Adler on, 134; galls 
of, 185 
35 vesicatria, 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. R., M.D., translation by, 
xviii 
Swanton, E. W., observations on red- 
currant gall, 24; of Neuroterus 
numismatis, 128; on abundance 
of galls, 24 
Synergus facialis in ten galls, xiv 
» vulgaris in nine galls, xiv 
