4°4 



NORTH AMERICAN DIPTERA. 



Syritta, 255 



SVRPHID/fi, 246 



Syrphus, 255 

 Systoechus, 215 



Systropus, 217 



Tabanus, 181 

 TABANlDiE, 176 

 Tabuda, 207 

 Tacbina, 375 

 Tachinid^, 358 

 Tachinomyia, 378 

 Tacbinopsis, 375 

 Tacbydromia, 223 

 Tachypeza, 222 

 Tachytrechus, 233 

 Tseniorhynchus, 108 

 Tanpezi'd^, 264 

 Tanypremna, 91 

 Tanypus, 114 

 Tanytarsus, 115 

 Taracticus, 201 

 Tauromyia, 298 

 Telmatogeton, 114 

 Telostylus, 266 

 Telothyria, 371 

 Temnostoma, 259 

 Tephritis, 287 

 Tephrochlamys, 325 

 Tcphronota, 276 

 Tersesthes, 115 

 Tetanocera, 323 

 Tetanops, 276 

 TetrachiEta, 336 

 Tetragoneura, 136 

 Tetragrapha, 377 

 Tetropismenus, 276 

 Teuchocneuiis, 258 

 Teucholabis, 88 

 Teuchophorus, 235 

 Toreus, 226 

 Townsendia, 198 

 Toxomerus, 255 

 Toxorhina, 87 

 Toxophora, 217 

 Toxotrypana, 283 

 Thahissomyia, 114 

 Thecodiplosis, 129 

 Thecomyia, 323 

 Thelaira, 357 

 Thelairodes, 356 



Themira, 270 

 Theresia, 357 

 Thereva, 207 

 Therevid^, 205 

 Theria, 351 

 Therioplectes, 181 

 Thinodromia, 223 

 Thinophilus, 235 

 Thrypticus, 233 

 Thryptocera, 365 

 Thysanomyia, 375 

 Tinolestes, 109 

 Tipula, 91 

 Tipulid^E, 81 

 Tragi n ops, 296 

 Trichina, 225 

 Trichobius, 385 

 Trichocera, 89 

 Trichocladius, 115 

 Trichogena, 376 

 Trichomyia, 93 

 Trichonta, 138 

 Tricophora, 377 

 Trichophthicus, 334 

 Trichopoda, 361 

 Trichopteromyia, 127 

 Trichosia, 139 

 Trichotanypus, 114 

 Triclis, 199 

 Tricolyga, 377 

 Tricopalpus, 330 

 Trigonometopus, 323, 321 

 Trimicra, 89 

 Trineura, 238 

 Triodonta, 258 

 Triognia, 90 

 Triptotricha, 163 

 Tritoxa, 276 

 Tritozyga, 127 

 Trixa, 363 

 Trixodes, 355 

 Trochilides, 375 

 Tromodexia, 355 

 Tropidia, 257 

 Tropidoniyia, 262 

 Tropidopsis, 377 

 Trypeta, 286 

 Trvpktid^;, 282 

 Triplasius, 215 

 Tylotnyia, 270 

 Tvreomtna, 342 



