XII TABLE OF CONTENTS. 



Page. 



Family Tyrannid.e 385 



Key to the Genera of Tyrannidpe 340 



Genus Copurus Strickland 349 



Key to the Species and Subspecies of Copurus 350 



1 . Copurus leuconotus Lafresnaye 351 



Genus 2. Onychorliynchus Fischer 352 



Key to the Species and Subspecies of Onychorhynchus 353 



2. Onychorhynchus mexicanus mexicanus (Sclater) 354 



3. Onychorhynchus mexicanus fraterculus Bangs 356 



Genus 3. Oncostoma Sclater 357 



Key to the Species of Oncostoma 358 



4. Oncostoma cinereigulare (Sclater) 358 



5. Oncostoma olivaceum (Lawrence) 360 



Genus 4. Todirostrum Lesson 361 



Key to the Species and Subspecies of Todirostrum 363 



6. Todirostrum cinereum finitimum Bangs , 364 



7. Todirostrum nigriceps Sclater 366 



8. Todirostrum schistaceiceps Sclater 367 



Genus 5» Lophotriccus Berlepsch 369 



Key to the Species and Subspecies of Lophotriccus 370 



9. Lophotriccus squamtecristatus minor Cherrie 371 



Genus 6. Atalotriccus Kidgway 373 



Key to the Subspecies of Atalotriccus pilaris 374 



10. Atalotriccus pilaris jiilaris (Cabanis) 374 



Genus 7. Perissotriccus Oberholser 376 



Key to the Species of Perissotriccus 377 



11. Perissotriccus atricapillus (Lawrence) 377 



Genus 8. Placostomns Ridgway 378 



Key to the Species of Placostomus 379 



12. Placostomus superciliaris (Lawrence) 379 



Genus 9. Platytriccus Ridgway 380 



Key to the Species of Platytriccus 382 



13. Platytriccus cancrominus (Sclater and Salvin) 382 



14. Platytriccus albogularis ( Sclater) 384 



Genus 10. Craspedoprion Hartert 385 



Key to the Species and Subspecies of Craspedoprion 387 



15. Craspedoprion fequinoctialis (Sclater) 387 



16. Craspedoprion brevirostris (Cabanis) 388 



Genus 11. Rhynchocyclus Cabanis and Heine 389 



Key to the Species of Rhynchocyclus 391 



17. Rhynchocyclus flavo-olivaceus Lawrence 391 



18. Rhynchocyclus marginatus Lawrence 392 



19. Rhynchocyclus cinereiceps (Sclater) 394 



Genus 12. Serpophaga Gould 395 



Key to the Subspecies of Serpophaga cinerea 397 



20. Serpophaga cinerea grisea (Lawrence) 397 



Genus 13. Myiopagis Salvin and Godman 398 



Key to the Species and Subspecies of Myiopagis 400 



21. Myiopagis placens placens (Sclater) 401 



22. Myiopagis placens jaliscensis Nelson 402 



23. Myiopagis placens minima Nelson 403 



24. Myiopagis placens accola Bangs 403 



25. Myiopagis cotta (Gosse) 404 



