hieracii, 159.

rhoeadis, 159.

syncrepidus, 86.

Autumn gall, The, 59.

Balaninus villosus, 74.
glandium, 77.

Bald seed gall, The, 57.
Balfour, F. M., xxvi.
Bark gall, The, 39.
Barley-corn gall, The, 89.

Bassett, H. F., xiii, xiv, 3, 4, 5.
Bathyaspis aceris, 161.

Bees, parthenogenesis in, 153.
Benecke, xxx.

Beyerinck, M. W., xiv, xxxiii, 73,
85.

Biennial galls, 109.
Biophors, xxiii.
Biorhiza, 8, 71, 134.

aptera, xxxiii, xl, 71, 73, 76,
95, IOI, 124, 127, 134,
145.

renum, xxiv, xxxiii, xxxvii,
xl, 79, 80, 83, 95, 134,
138.

terminalis, 71.

Blastem, xxxvi.

Blastoderm, 4.

Blister gall, The, 22.

Boveri, on male parthenogenesis,
xxii.

on polar cells, xxvii.
Bracon aterrimus, 63.

caudatus, 79.

Bud gall, The, 40.
Buds, adventitious, 62.

selection of, 121.

Butschli, on polar cells, xxvii.

chlorinus, 77.

cingulatus, 77, 78.

confinis, 77, 78.
exilis, 77.

fuscicrus, 81.

inconstans, 50, 77.

latus, 77.

leptocerus, 77, 78.
leucopterus, 77, 78.
longiventris, 66.
minutus, 77, 78.
mutabilis, 77, 78.
nigricornis, 78.
parallinus, 77.
rubriceps, 84.

viridissimus, 77, 78.
Cambium ring, 98.

Cameron, P., xiv, 54.

Carpalinus fuliginosus, 77.

Carpocapsa juliana, 50.

Catkin galls, 49.

Cecidomyia, xvi, 77, 99.
Ceraphron, 77.

Ceroptres arator, 34, 37, 60, 86,

167.

Cetonia, 77.

Chaetochilus sylvellus, 77.
Chamisso, xv.
Cherry gall, The, 63.
Chromosomes, xxiii, xxxix.
Coitus, preparation for, 142.
Collared gall, The, 46.
Commensals, xii.

Corticaria transversalis, 77.
Cotton gall, The, 60.
Cryptidae, 122.

Cryptophagus collaris, 77.
Cryptus hortulanus, 79.
Cuckoo-flies, xii.
Curculionidae, 74.
Currant gall, The, x, 17.
Curved leaf gall, The, 47.
Cynipidae, xiv, 172.
Cynips aciculata, 2.
albopunctata, 93.
aries, 165.
autumnalis, 57.
callidoma, 52.
calyciformis, 165.

Echinus microtuberculatus, xxii.
Egg, development of, 14, 144.
failure, 13, 107.

rest, II, 14, 144.

Eggs, number of, xxix, 32, 72.

situation of, xxxiv, 102, 108.

Egg-stalk, 115, 122.

function of, 124, 127.

Elachestus cyniphidinm, 66, 79.
petrolatus, 47.

Embryo,development of,125,127.
Entedon amethystinus, 79.

cecidomycarnus, 47.

deplanatus, 79.

flavomaculata, 15.

leptoneurus, 50.

scianeurus, 47, 79.

Eulophus agathyllus, 79.

gallarum, 77.

laevissimus, 47.

metallicus, 47.

ramicornis, 79.

Eupelmus annulatus, 18, 47.

azureus, 42, 79.
urozonus, 21, 69.

Eurytoma gracilis, 47.
nodularis, 63.

rosae, 18, 30, 35, 42, 47, 63,
69, 79, 85, 89.
semirufa, 60.
setigera, 63, 69.
signata, 15, 50, 69.
squama, 69.
verticillata, 46.

Fabricius, xi.

evolution, xxxii.

flies, breeding of, 5, 9.

formation, beginnings of, 14,

17, 20, 29, 32, 97, 136.

exciting causes of, xxxviii.
seats of, xxxiv.

Galls, classification of, xxxiii.
compound, 33.

defensive characters of, xxxvi.
duration of life of, xxxix, 19.
superimposed, 105.
Ganglion, abdominal, 114, 120.
Geddes and Thomson on polar
cells, xxvii.

Gemmules, xxiii.

Generation cycles, xvi.

Geniocerus cyniphidium, 66, 79.
Geoffroy St. Hilaire, xii.
Germogen, xxx.

Germ-plasm, alternating, xxxi.
continuity of, xvi.
tracts, xxvii.
Giraud, xiii, 52.

Glands, vaginal accessory, 143.
Globular gall, The, 42.

Green velvet bud gall, The, 67.
Guest-flies, xii.

Homalomyia canicularis, 60.
Hop gall, The, 50.
Hydroids, xv.
Hymenoptera, 78.

Ichneumonidae, 126.
Idants, xxiii.

Ids, xxiii.

Inostemma Boscii, 77.

Inquilines in galls, xii, 15, 106.
eggs of, 127.
IntestinalsystemofCynipidae, 1 38.

Kidney gall, The, 81.

Knot gall, The, 34.
Kraepelin, 110, 113.
Kupffer, xxx.

Lacaze-Duthiers, xiii, xxiii.
Lammas shoots, 25, 34.
Lampronota segmentata, 79.
Larva, development of, 147.
influence of, 100, 104.
Larval states, xvii, 143.
Latreille, xii.

Latridius lardarius, 77.

transversus, 78.

Lepidoptera, 78.

Leptoptera appendiculata, xvi.
Leuckart, xvii.