482 



AMERICAN HYMENOPTERA. 



PAGE 



Sting and appendages .... 221 



stipes 224 



strenuus .... 246, 248, 257, 297 



subcosta 226 



sub-costal vein 227 



sub-discoidal vein 227 



sub-genus Bombus 260 



sub-median cell 228 



suckleyi 451, 471 



suckleyi 459 



sulfuratus 208 



supra-antennal line 209 



supra-orbital line 208 



sylvicola . .243, 245, 249, 251, 252, 

 255, 260, 338 



sylvicola 335 



Syrphidae 239 



table of Bombus males .... 255 

 table of Bombus queens . . . 241 

 table of Bombus workers . . . 249 

 tables of Psithyrus species . . 449 



tegula 226 



ternarius . . . 247, 255, 260, 314 

 ternarius 



319, 328, 329, 335, 438, 439 

 Terrestris group .... 199, 261 

 terrestris moderatus 



246, 248, 252, 258, 262 

 terrestris 274 



PAGE 



terricola . 246, 249, 253, 258, 274 



terricola 263, 265 



thorax 215 



titusi 401, 402 



translucent areas 213 



transverse cubital vein .... 227 

 transverse median vein . . . 228 



tricolor 450, 476 



tricolor ... 290 



tubercular areas 213 



types of genera and subgenera 



186, 260, 447 



uncus 225 



vagans 238, 242, 246, 253, 259, 349 



vagans 277 



vancouverensis 333 



vancouverensis . . . 328, 329, 439 



variabilis 450, 451, 461 



variabilis 466 



vertex 209 



virginicus 309, 310, 425 



vision, organs of 211 



volsella 224 



volucelloides 208 



vosnesenskii 



238, 243, 249, 258, 325 



wax shears 232, 233 



wings 226 



Xylocopa virginica 314 



