X TABLE OF CONTENTS. 



Page. 



Family Icterid.e. The Troupials 169 



Key to the Genera of Icteridai 173 



Genus 1 . Zarhynchus Oberholser 175 



1. Zarhynclius wagleri wagleri ( ( Iray ) 176 



2. Zarhynchus wagleri mexicanus Ridgway 178 



Genus 2. Gymnostinops Selater 178 



Key to the Species of Gymnostinops 179 



3. Gymnostinops montezuma (Lesson ) 180 



4. Gymnostinops cassini Richmond 181 



5. Gymnostinops guatimozinus (Bonaparte I 182 



Genus 3. Ostinops Cabanis 183 



6. Ostinops decumanus ( Pallas ) 184 



Genus 4. Cacicus Lacepede 186 



Key to the Species of Cacicus 188 



7. Cacicus vitellinus Lawrence 188 



8. Cacicus microrhynchus (Selater and Salvin i 189 



Genus 5. Cassiculus Swainson 190 



9. Cassiculus melanicterus ( Bonaparte ) 191 



Genus 6. Amblycercus Cabanis 192 



10. Amblycercus holosericeus (Lichtenstein ) 194 



Genus 7. Cassidix Lesson 196 



Key to the Subspecies of Cassidix oryzivora 197 



11. Cassidix oryzivora violea Bangs 197 



12. Cassidix oryzivora mexicana ( Lesson ) 199 



Genus 8. Callothrus Cassin 200 



Key to the Species and Subspecies of Callothrus 201 



13. Callothrus rol:)Ustus (Cabanis) 201 



14. Callothrus aeneus feneus ( Wagler ) 203 



15. Callothrus teneus assimilis Nelson 204 



Genus 9. Molothrus Swainson 205 



Key to the Species and Subspecies of Molothi-us 207 



16. Molothrus ater ater (Boddaert) 207 



17. Molothrus ater obscurus (Gmelin ) 210 



18. Molothrus atronitens (Cabanis) 211 



Genus 10. Quiscalus Vieillot 212 



Key to the Species and Subspecies of Quiscalus 214 



19. Quiscalus quiscula quiscula ( Linn;eus ) 215 



20. Quiscalus quiscula agheus (Baird ) 217 



21. Quiscalus quiscula a^neus ( Ridgway ) 219 



Genus 1 1. Holoquiscalus Cassin 222 



Key to the Species of Holoquiscalus 224 



22. Holoquiscalus gundlachii ( Cassin) 226 



23. Holoquiscalus jamaicensis (Daudin) 227 



24. Holoquiscalus niger ( Boddaert ) 228 



25. Holoquiscalus l)rachypterus (Cassin ) 228 



26. Holoquiscalus caymanensis (Cory) 229 



27. Holoquiscalus fortirostris ( Lawrence ) 229 



28. Holoquiscalus inflexirostris (Swainson) 230 



29. Holoquiscalus martinicensis Ridgway . 231 



30. Holoquiscalus guadeloupensis ( Lawrence ) 232 



31. Holoquiscalus luminosus (Lawrence) 232 



32. Holoquiscalus rectirostris ((^assin) 233 



Genus 12. Megaquiscalus Cassin 233 



