478 



AMERICAN HYMENOPTERA. 



INDEX. 



The names in italics are synonyms. 



abdomen 219 



affinis . . 247, 253, 258, 259, 277 



aggressive mimicry 239 



alaskensis 368 



alata {Apis) 451 



albertensis 440, 442 



alboanalis . . 242, 243, 253, 385 



alpina {Apis) 302 



ambiguus 



242, 243, 245, 246, 250, 376 



americana 401 



mnericanorurn . 299, 400, 401, 406 



anal vein 228 



anatomy, external 204 



antennae 210 



antenna cleaner 230 



Apathus . . 447, 451, 452, 455, 466 



apical cell 227 



apical projection 224 



Apis 184 



Apis 185, 447 



appositus . 243, 250, 251, 258, 285 

 arcticus .... 248, 254, 258, 302 

 arrangement of descriptions . 240 



ashtoni 449, 451, 466 



Ashtoni group 199, 465 



Asilidse 238 



astragali 439 



atrifasciatus . . 291 



auricomus . . . 244, 248, 253, 256, 



405, 407, 410, 412, 413 



Auricomus group . . 199, 411, 412 



aztecus 392 



aztecus 389 



balteatus 290 



basal arms 222 



basal vein 228 



bicolor 450, 460 



PAGE 



bifarius .332 



bifarius 328, 329 



bimaculatus . . 242, 253, 259, 305 



bolsteri 249, 255 



Bombias 198, 410, 411 



Bombidse 182, 183 



Bombides 182 



Bombina 182 



Bombinae 182 



Bombus 185, 235, 241 



Bombus 447, 451, 455 



Borealis group 199, 281 



borealis .... 245, 250, 258, 282 



borealis 285, 286 



branch 224 



Br emus 185, 399, 447 



bulb 222 



butteli 208 



californica 393, 394 



californicus. 238, 246, 248, 254, 258, 



259, 260, 393 



californicus 325, 326 



campestris 458 



cardo . . 223, 225 



carolinus 238 



carriei 360 



centralis .... 245, 249, 250, 251, 



257, 258, 371 



Centris 184 



Centris . . . . ...... 399 



cevallicE 401. 402 



characters of Bombidae . . . 184 

 characters, constancy of . . . 235 



cheeks 209 



citrimis 451,452,476 



clasper 223 



climatic variation 200 



coccineus 208 



