Q. turbinella, 199
Q. undulata, 280, 290, 318, 350
Q. utahensis, 354, 418
Q. wilcoxii, 207
Q. wrightii, 290
radicola, 453
ribes, 195
rubrae, 301
rubricosa, 254
Rumania, 108, 118, 125, 141, 154, 159, 167
russa, 39, 343
rydbergiana, 317
saccularius, 453
scelesta, 422
schlechtendali, 93
schulthessae, 30, 39, 181, 202
scutellaris, 101, 102-104, 109, 123
serratae, 453
sessilis, 453
similis (Bassett), 454
similis Adler, '144
simillima, 454
simulatrix, 277, 280
South Carolina, 301, 324, 328, 337, 388, 391, 410
Spain, 100, 108, 125, 133, 150, 175
Species concept, 17-24
speciosus, 191
Sphaeroterus, 306, 308, 310
splendens, 454
strians, 304
Structures, gall, 40-43, 94, 254, 376, 511, 513, 527, 559
Structures, insect, 503
substituta, 144
sulcata, Liodora, 121, 454
sulphurea, 454
Summary, 5
suspecta, 364
Sweden, 106
Switzerland, 106, 141, 154, 166, 171
Tarsal claw, 509, 525, 533, 541, 549, 565
taschenbergi, 105, 116, 144
Taxonomic method, 8-10
tecturnarum, 454
Temperature effects, 44, 112
Tennessee, 254, 301, 328, 333, 335, 337, 366, 382, 388, 391, 410
tenuicornis, 454
teres, 27, 213, 219
texana, 454
Texas, 254, 285, 292, 294, 302, 314, 322, 323, 351, 420
tritior, 235
undulata, 416
unedoniformis, 102
unica, 319
Utah, 355, 418
vacinii, 455
vacciniifoliae, 455
vanescens, 292
verrucosa, 158
vesiculoides, 455
vicina, 39, 196
villosa, 29, 52, 347, 355
Virginia, 265, 299, 332, 335, 366, 382, 388, 396, 427
vorisi, 46, 255
Washington, state, 241
West Virginia, 300, 378, 381, 391, 396
wheeleri, 45, 58-60, 380
Wing mutations, 26-36, 52, 521, 523, 537, 539, 545, 547, 561-567
